The Launcher for Hoi4. Items 1 through 7 are as follows: 1) game version and checksum 2) video display button 3) clear user directory button 4) game play button 5) create account button 6) downloadable content (DLC) tab 7) mods tab.

• Hoi4 Best Division Template

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Note that the DLC tab is currently open. 1) Game version - Observe that the graphic shows game version 1.5.4 and checksum 1503. Saved games are set to the game version and that are currently playing. If the saved game version and checksum do not match the game version and checksum, then the saved game will not work. Be aware that the game is normally on automatic updates and once Man the Guns (version 1.6) is released, then version 1.5.4 saved games will not work unless the game is rolled back to the matching version.

This can be found on the Paradox Forums. Note that this procedure requires a game code for each owned game branch and that a Paradox Interactive account is needed to view those codes for input into Steam. 2) Video display button - Clicking the gear icon opens the video display menu. This menu has 3 dropdown menus; Display Mode, Resolution, and Refresh Rate. The Display Mode allows three choices: Fullscreen, Windowed, and Borderless.

Fullscreen is recommended because Windowed and Borderless modes on some systems have been known to cause launch issues such as blackscreens and failure to launch the game (reference ). The Resolution allows a multitude of choices such as 1600x1024, 1680x1050, etc. Matching the game's resolution to the monitor's native resolution usually gives the optimum viewing experience. The Refresh Rate should also be set to match the monitor, if possible. The 60 Hz selection is recommended because it is quite common and the 50 Hz selection has been known to cause launch issues such as blackscreens and failure to launch the game. Uv layout similar details.

This graphic has a vertical arrow pointing to the video display button represented by the gear icon. Clicking the 'gear icon' will open the video display menu (see horizontal arrow) revealing 3 dropdown menus; one menu each for Display Mode, Resolution, and Refresh Rate. Clicking on each small, inverted, green triangle will open a menu for choosing your video preference. The graphic shows that Fullscreen, 1920x1080, and 60 Hz have been selected. 3) Clear user directory button - Clicking on this button will clear your HOI4 user directory. Only click on this button if you are experiencing game crashes. Reference the Tooltip in the graphic.

A graphic with arrows pointing to the 'Clear user directory' button and its associated Tooltip. 4) Game Play button - Click the game Play button after choosing the video settings, DLC, and mods.

5) Create Account button - Click this button to create a Paradox Interactive account. It is recommended that you create an account as it will give you access to technical support in the event that the game becomes problematic. A Paradox Interactive account is also needed to log into the Paradox Plaza website to access the codes for previous branches of each game that is owned. This is due to the enactment of the General Data Protection Regulation (GDPR). Other benefits include access to bug reports, game suggestions, etc. 6) DLC tab - Clicking on the DLC tab will reveal all of the downloadable content purchased for this game.

Clicking an item will place a green check mark next to the item indicating that it has been selected for inclusion in the game. No check mark indicates that the item was not selected for the game. The graphic shows that all purchased items (Anniversary Pack, Historical German Portraits, Poland: United and Ready, Rocket Launcher Unit Pack) have been selected. Note also that such DLC as Together For Victory, Death or Dishonor, and Waking the Tiger are not shown in the graphic as this user did not purchase those items. 7) Mods tab - Clicking on the Mods tab will show a pulldown menu capable of revealing all of the mods that have been downloaded for the game. Clicking an item will place a green check mark next to the item indicating that it has been selected for inclusion in the game. No check mark indicates that the item was not selected for the game.

The graphic shows that the mods 'Coloured Buttons' and 'More Division Icons' have been selected. Mods can be downloaded from the Steam Workshop. Be aware that some mods will deactivate the ability to get achievements during gameplay and that some mods are not updated for the latest version of the game which can lead to a system crash. Reading the author's information about their mod will usually indicate if the mod is compatible with achievements and what version of HOI4 that their mod has been updated to. A graphic with an arrow pointing to the 'Mods' tab. The 'Coloured Buttons' and 'More Division Icons' mods have been selected.Troubleshooting the game Try the solutions listed below if the game fails to launch, freezes, crashes to desktop (CTD), or 'blackscreens'.

The most common causes and solutions are listed first. Contact technical support or visit the forums for additional help. This section may contain outdated information that is inaccurate for the current of the game. The last version it was verified as up to date for was 1.5.In the lower right corner of the map before starting the game are the game settings. Here the player can toggle and on or off and use the difficulty settings to make the game harder or easier for the player and also boost the relative power of one or more of the more important nations (this makes them stronger, but not smarter).

There is also an icon for showing if steam can be earned in the game or not, they require ironman mode and regular or higher difficulty. When finished press the play button in the lower right hand corner to start the game.General difficulty settings The general Difficulty settings affect only the player.

This section may contain outdated information that is inaccurate for the current of the game. The last version it was verified as up to date for was 1.3.Main article:The of Hearts of Iron IV will immediately appear familiar to veterans of Paradox strategy games. The left hand of the screen is used to manage large national issues, alert tabs will appear at the top of the screen to warn players of things that need attention, and the right hand side of the screen will be devoted to information about the troops. The very top border of the screen will include important summary information about the state of the game and the world.Across the top left to center of the main play screen is a row of numbers running from left to right. National focus tree of Italy.

(Click to enlarge.)The player will be prompted to choose a for the country if none is active. It normally takes 70 days to complete a national focus, and it costs one political power point per day. National focuses form a tree, like the technology tree, but rather than unlocking technology they are about the country's choice of direction.

One may choose to, for the moment, focus on industrial or technological growth, or orient the country's diplomacy towards certain other countries, forming research pacts, starting factions, gaining claims, or threatening war. Some National Focus choices are mutually exclusive; for example, the cannot be friends with both and.This menu also allows political power to be spent in order to change government laws or hire political, military and industrial advisers. Most changes will cost a minimum of 150 political power, and very powerful advisers may cost up to 250, with extremely powerful laws and advisers costing up to 300 political power and sometimes even more than that.Laws and government. Conscription law: affects how much manpower a country has available. Trade law: affects research speed, factory and construction speed and how many resources are available to be traded. Economy law: affects how many factories are dedicated to consumer goods, manpower availability, and military production.

Political Advisor screen.There is space for three political advisers who can be hired to give bonuses.Research and production A tank designer, ship designer, aircraft designer and material designer can be added to earn bonuses to either production of the relevant weapon system, or affecting its combat abilities.An industrial concern and a theorist can also be added to improve certain types of research.Military staff A Chief of Army, Chief of Navy and Chief of Air Force can be added to improve research or combat skills in their respective services. Three other members of the high command may be hired.Decisions The gray button at the top of the screen marked with a gavel opens the Events and Decisions menu. Decisions allow a nation to do special projects such as switching ideology, conducting border wars, banning political parties, censoring the press, etc. These decisions typically cost anywhere from 25 to 200 political power, except for a few decisions which require no political power at all. Decisions are a middle ground between focus trees and events (allows additional modding and mechanics).Research Main article.

Research screen.The gray button at the top of the screen marked with a beaker opens the menu. There are three or four slots available to research particular technologies, but by pursuing specific national focus ideas the nation may unlock additional research slots, usually up to five.There are eleven categories of research. Each nation starts with a historically appropriate level of technology and theory, depending on the scenario.All the research trees (except for ) are marked along a historical timeline. Researching a technology or unit before their historic year takes longer than it would if researched on or after the historic date.

This penalty may be reduced by pursuing certain national focus ideas. Land doctrine screen.: Most of the great powers will start with an initial land doctrine. This may be changed, but all land doctrine paths are mutually exclusive. Each land doctrine chosen assigns its own major combat bonuses.: researching more advanced warships, submarines, convoy/landing craft and -with the Man The Guns DLC- naval modules used to upgrade ships.: Some of the great powers will start with an initial naval doctrine. This may be changed, but all naval doctrine paths are mutually exclusive.

The chosen naval doctrine will assign major bonuses.: researching different types of fighters, attack planes and bombers as well as carrier borne variants.: Some of the great powers will start with an initial air doctrine. This may be changed, but all air doctrine paths are mutually exclusive. The air doctrine chosen will assign major combat bonuses.: researching electrical engineering for radars (for detection) and computers (for research and encryption bonuses), as well as researching nuclear and rocket technology: researching means to improve the efficiency, productivity and resource extraction capabilities of the player's country.Diplomacy Main article:The gray button with a hand ready to be shaken opens the menu. Here is a list of nations and a number of filter buttons to narrow down the list.When the player clicks on a nation to interact with it, this will display a portrait of its leader and a little bit of information about what the nation is up to. In the upper right corner of the menu, one will see a couple of tiny flags with arrows indicating the relationship between the two nations.There are a number of actions one can take in the diplomatic menu, provided the requirements are met. Democracies are especially limited in their abilities to undertake aggressive diplomatic actions unless the world tension meter has climbed to a high enough level.Hover the cursor over each option for a description of the diplomatic action and what conditions must be met.Trade Main article.

Trade screen.The gray button with box and curved exchange arrows opens the menu. The player will see a number of tabs and columns listing the major resources available, what is required and possible trading partners.There are six major in the game: oil, aluminum, rubber, tungsten, steel, and chromium. These are used to help in the construction of tanks, battleships, planes and so forth. Each new production line of a major weapon system will require a certain amount of resources. Though one can build these units without the necessary resources, production will be much slower and less efficient.Resources are found in certain locations on the map and are not evenly distributed. One will almost always have to trade for what one needs.To trade for a resource, click on the name of the country and move the slider to determine how much one is trading for.

Resources are typically traded in units of 8. Each trade, unless conducted over land, requires a minimum of 1 convoy vessel plus additional convoys depending on naval distance and total quantity of resources.Every 8 units of a resource one imports will also cost a civilian factory, with that productive power going to the nation that is being traded with.

Therefore, exports will make a country's industry stronger as civilian factory 'power' is pulled from other nations, but a lot of imports will make a country weaker due to the loss of civilian factory 'power'. However, it may be necessary to import resources to keep the war machine running at optimal efficiency. Tip: trading with puppets gains considerably more than 8 resources per civilian factory traded.Construction Main article:The gray button with the excavator opens the menu. This is where one will assign tasks to civilian factories - building infrastructure, new factories, defenses, and so on.make all the improvements to a State. The number of factories available for construction will depend on the size of the nation, how many factories are being dedicated to providing consumer goods for the country's population (Economy Law), and how many factories have been “traded” for strategic resources. The amount of civilian factories can be increased by building more, but be careful since each State can only support a certain number of productive structures. A maximum of fifteen factories will be devoted to a construction project, and any left over will work on the next item in the queue.There are three categories of structure that can be built with civilian factories.State structures These constructions improve the state without using up one of the shared building slots.

Instead, each type of improvement here has its own level and maximum.: Each state has an infrastructure rating that determines how easy it is to supply units in the state, how quickly military units can move through the state, how quickly shared buildings can be constructed, and increases resource output.: The larger the air base, the more planes it can effectively field. Air bases house military aircraft.: Helps defend a state from enemy aircraft attempting to strategic bomb installations such as refineries, factories, infrastructure, etc.: Helps the air force detect and engage enemy air wings, increases detection of nearby enemy fleets at sea, and gains intel on enemy troops in nearby states.Shared structures The number of shared structures that can be built is limited by the number of slots available in that State. The number of slots can be increased by researching Industry technologies. Some National Focuses also add extra slots in specific states.: Used to produce weapons, equipment, planes, and vehicles.: Used to produce and improve a nation's military/industrial capacity.: Produce synthetic oil and rubber, especially useful to nations that lack either.: Used to produce ships and convoys. Can only be built in coastal states.: Locations from which to produce rockets and to launch rocket attacks on nearby nations.: Produces nuclear weapons.Province buildings Province buildings are built on the smallest territory size in HoI4, the province.: Stations and repairs, and can send and receive supplies and resources via convoys. Each naval base level increases supply capacity and supply throughput.: Inflicts an attack penalty of -15% for each fort level on the attacker in combat.

Attacking from multiple directions will reduce forts effect.: Inflicts an attack penalty of -15% for each fort level on the attacker in naval invasion combat.Production The gray button with the wrench opens the menu. This is where and are assigned to build, army vehicles, and.The more factories one dedicates to building a specific item, the more will be produced. Infantry, armor and artillery units made will then be assigned to the appropriate military divisions, either for new units being constructed or reinforcement and upgrades for units in the field. Excess equipment is left in the national stockpile. Airplanes produced will be deposited into a reserve pool.

Naval units will be automatically placed in the highest level naval base, though one can assign a port or fleet if that would be preferable (recommended for the so they don't end up with all new ships stuck in the Black Sea).Factory output is dependent on the availability of strategic resources for higher end units, and on the efficiency cap of a country's industry. New production lines will take time to be perfectly efficient, and if one adds factories to a production line, some of that efficiency will be lost. The factory productivity and efficiency can be improved in the Industrial research tree.Recruit and deploy Main article:The gray button with the tank opens the menu to recruit and deploy units. This is where it is decided what types of are to be trained.

These divisions will be filled by the equipment and vehicles built in the production menu. What is required to complete a new unit is shown by hovering over the green progress bars.

The country starts with a few default divisions that can be built. Can be spent to design a new or edit ones that already exist.The game starts with reinforcement and upgrades given equal weight with the creation of new units. If it is preferable focus the energy of new tanks or artillery on fresh units, instead of trickling equipment to the field, reinforcement priorities can be set on this screen as well.Logistics Main article:The gray button with the paper and pen opens the menu. This menu gives an overall summary of stockpiled equipment, whatever shortages the country might have, as well as a rundown of how many strategic resources the country is missing from the production lines.Controlling the army. This section may contain outdated information that is inaccurate for the current of the game. The last version it was verified as up to date for was 1.3.Main article:The player can move their units by selecting them with the left mouse button and then clicking their destination with the right mouse button. If one draws a box around a group of units using left click and drag, all units inside the box can be commanded.

One can move troops across the ocean to friendly territory, by sending the units to a province with a naval port and then shift-clicking on a destination port. For an overview of all divisions, including indications of their combat status, click on the Army View icon under the date or press hotkey 'o'. Right-click on a division's info bar to pan over to it or hold down shift and left click on multiple units to select them all.Troops are more effective when they are grouped into armies under a 's command and given plans to execute.Creating command groups/armies Main article:The player can create of units by selecting a group of them and then clicking on the silhouetted portrait or green plus sign that one will see at the bottom of the screen. Then, go to the selected unit profile in the upper left and click on the silhouetted portrait. This will open up the list of generals to be assigned to armies.There are two types of military leaders – generals (who can effectively command a maximum of 24 units) and field marshals (who have no limit on the number of units they can effectively command). Commanders may also have attributes that give them bonuses in certain types of combat situations. If one promotes a general to field marshal, they lose their attributes (except 'old guard') as field marshals have different attributes.Experience and giving orders Countries will gain mostly through combat, but one can start a trickle of early experience by having soldiers 'exercise'.

To do this, select the army group and, in the unit profile in the upper left of the screen, click the exercise button in the upper right of the menu. Be aware that this results in higher equipment attrition, which may not be desirable as a country with limited industrial capacity.One can spend experience to promote generals and allowing them to lead more troops, or to create and edit new division types in the unit menu.An army group can be commanded like any other group of units and simply giving a right-click move order to a destination. However, they will fight better if they are given ' – a general order that is coordinated along a front, either to advance or defend.When the player selects an army group, they will see a row of general orders appear at the bottom of their screen. Each of these has rollover text that explains in detail how to use this instruction. This guide will focus on the most important ones.: Use this for amphibious attacks on enemy territory.

(One can move into friendly territory this way, but it is more efficient to simply use port to port movement as described above.)When one selects naval invasion, one will be asked to left-click on an origin point. This is where the army will gather for the assault. Right click on the enemy province one wants to invade. Note that one will need to have some naval intelligence of every sea lane they will be crossing, so one will have to have warships patrolling or hold naval superiority in those sea areas.All plans take time, and amphibious invasions take a lot of time to plan.

Once the weeks (or months) of preparation are ready, the grey arrow above the army group will turn a faded green. Press that arrow to activate the plan.: To make a for offensive land operations, one must first define one's defensive front – this is the point from which the army group will begin their operations. Select the defensive front button and, on the map, draw a line to indicate where an army group will start.

(In many cases, this will be a national border or the current line dividing enemy armies). Then, click the offensive front button (a line with an arrow) and draw the front to where the armies should advance.The army group units will begin to organize themselves along their defensive front. When they are in place and one is ready to begin, press the green arrow and the units will begin to execute the plan.One can research and hire advisors that will reduce the time for a military plan to be prepared or add bonuses to units that are operating with a plan.Controlling the navy.

This section may contain outdated information that is inaccurate for the current of the game. The last version it was verified as up to date for was 1.3.will be automatically grouped into fleets at ports as they are constructed. If one does not like the way fleets are organized, one can drag-and-drop silhouettes of ships from one fleet to another.Assign to one's fleets by clicking on the silhouetted portrait and choosing from available naval commanders. Political Power points may be spent to recruit new admirals for the fleets.

Like generals, admirals may have skills that are assets in particular battle situations or while commanding certain types of vessels. Admirals do not have a maximum amount of ships to lead.If a fleet is selected, a row of different orders will appear above it. These range from simple patrol missions to convoy escort duty. Choose a mission for the fleet (submarines, for example, are best used to interrupt convoys), and then right-click on up to three contiguous, i.e., sea zones that touch each other. This fleet will then carry out that mission over these areas.

One can remove these orders by returning the fleet to port and assigning a new mission.So long as a fleet is operating in a sea zone, enough intelligence should be gathered about that zone to both route supply overseas through that region or to order an amphibious assault across that space, but if the enemy is active in the region, naval superiority is also required.Controlling the air force. This section may contain outdated information that is inaccurate for the current of the game. The last version it was verified as up to date for was 1.3.Main article:Unlike other units, that are constructed are sent to a hangar.

One can mobilize them by clicking on an, then creating a using the button to the upper right of the resultant menu (it has a plus sign). The larger the airfield, the more planes it can efficiently use.Like, air units operate over regions and are given specific missions relevant to the type of aircraft. Fighters can do air superiority or interception, strategic bombers can target industry or infrastructure, tactical bombers can do close support of land attacks, and so on.

To assign an air wing to a region and a mission, click on an air field. This will open the air information map mode.Left click on an air wing and then right click on the region where it should operate. One can decide what mission it will perform. Planes have limited range depending on their type (strategic bombers have a much greater range than interceptors) and design (dependent on technology researched or experience spent to edit their abilities).Supply. This section may contain outdated information that is inaccurate for the current of the game. The last version it was verified as up to date for was 1.3.Armies in the field will require supplies to remain in fighting shape. An army out of can take no offensive actions at all, including simple movement, even if unopposed.

Supply is determined on a territorial basis (i.e., potentially larger than a single State) where each territory is able to support a specific number of troops. However, the final value of this supply to an actual unit is modified by the infrastructure of the State the unit is stationed within.

If a territory can support 10 units easily, but if the army is in a province with very low or damaged infrastructure, a supply bottleneck will develop, so not every unit in that army will get what it needs.Supplies coming over land are also provided by adjacent territories - which forms a supply line back to the capital or an alternate territory if the capital territory is not in one's control. This is why it is particularly important to maintain and defend contiguous States between home and the front lines.When land paths are unavailable supplies will be transported via sea. Overseas supply is done through. Larger ports can funnel more supply across the ocean, though this will also require more convoy ships.

For overseas convoys to be most effective, one will need to assign some of one's naval vessels to Escort duty in the regions that they will cross.The player can check the supply lines and capacities by clicking on the Supply map mode in the menu to the lower right of the main screen.Special weapons. This section may contain outdated information that is inaccurate for the current of the game. The last version it was verified as up to date for was 1.5.If all three (Atomic Research, Nuclear Reactor, Nuclear Bombs ) have been unlocked and at least one nuclear reactor has been built, then you will slowly acquire. To deliver a nuclear bomb the player must use a strategic bomber and have at least 75% air superiority over the strategic air region of the target province.

Select the province one wants to attack and press the nuclear strike icon in the lower left of the province information menu. A nuclear bomb will destroy most of the infrastructure and industry of the target and will damage any units in that area.If one researches both and and also builds a rocket site, then may be launched at distant States to damage their infrastructure. The main advantage of guided missiles is that they cost zero production and zero resources and do not tie up any military factories. Instead, guided missiles are automatically produced at each rocket launch site at the rate of one every 24 hours. Rocket sites have a maximum capacity of 100 guided missiles which means that the launch site will be totally filled at the end of 101 days assuming no missiles have been launched. Further research into and allows rocket sites to manufacture and launch and respectively.

At present it is not possible to launch nuclear bombs using rockets.Capitulation and winning the war. This section may contain outdated information that is inaccurate for the current of the game. The last version it was verified as up to date for was 1.5.Once a country has lost owned above a certain threshold that depends on its war support, it will capitulate. All divisions they own in their or occupied territory will be disbanded and their territory will be instantly occupied by the aggressor, but they carry on as a government-in-exile and keep control of their colonies (non-core provinces) - for example, the Netherlands keeps control of the Dutch East Indies. Partisans in occupied territory will continue to be a problem as long as the country's fellow faction members carry on the war - after all, they can still hope for liberation.If more than one country is fighting on the losing side of the war, the entire faction will surrender when the last major country in it surrenders (you can see which countries are considered majors on the world diplomacy screen). When this happens, the game will pause and a will begin.

The peace conference proceeds in stages based on the war effort expended by the victorious powers. So, for example, if the Allies defeat and the achieved the most in the war followed by the, the United States will have the first chance to make demands on the Germans, followed by the United Kingdom. Then, the next most significant victor(s) will make their demands.This continues until all the victors are satisfied with the peace, all available demands have been made or no nation can afford to make additional demands on the defeated powers.War demands have a cost, and this cost is deducted from the war score of the victorious nation. Some demands, like making a nation a, require having that as a unless the rules of the nation allow puppeting without a war goal.Tips to getting started. This section may contain outdated information that is inaccurate for the current of the game. The last version it was verified as up to date for was 1.3.As the player is learning Hearts of Iron IV, remember these important steps as one formulates their plans for world domination. One will start the game with a few of weapons already active.

The most important of these will be one's infantry, so, until more military factories have been built, put most of one's energy here. When a country is new, have multiple lines of infantry going at once. If one doesn't, one will fall behind in army size.

Plan out early in the game. For instance will want to move quickly along the paths that give it claims on. The will need to get itself out of the Great Depression. Has to watch its political stability.

Have a long term goal in mind. Keep in mind you don't have to research all the National Focuses one after another. Sometimes it is best to wait a bit for the opportune moment, especially with research boosting focuses. Each nation has access to extra slots if they activate specific national focuses.

These are easily identified by the beaker icons on the names (though some focuses with that icon give research bonuses instead - read the tooltips for details). The sooner these are unlocked, the better the army will fight. When researching, try not to rush too far ahead since there are significant penalties to pursuing technology too early in the timeline. However, if one researches computing in the electrical engineering track, one can reduce their total research time by a significant margin. If a powerful is not central to one's plans, one can usually ignore this aspect of the war and research tree. However, convoys are always useful for trade and supply, so have whatever owned should focus on that. If one is at peace, armies should so they can train until they reach regular status and earn.

Adding an extra regiment, line battalion, or support company to an existing is an easy way to beef up one's forces – unless one doesn't have the equipment on hand to reinforce what one has. In wartime, it is often better to let the new equipment fall into the hands of new units instead of reinforcing and upgrading old ones. Adjust the reinforcement and upgrading of troops with an eye to what one needs now – more active units in the field now or a stronger punch in a few months time.

Democracies should change their economic as soon as they can in order to free up that are otherwise dedicated to producing civilian goods. Don't forget to rest armies after they have reached their objectives. A few days of inaction will help with organization, reinforcement and supply.Advanced Tips.

This section may contain outdated information that is inaccurate for the current of the game. The last version it was verified as up to date for was 1.3. Remember infrastructure and fortifications.

Should one be attacked, a line of land forts and a for a defensive hold along a strategic line (like mountains or a river) could give the player time to hold off an invasion as he waits for help from allies and/or their own reinforcements. If you lack a resource, but produce it locally (i.e. Steel is produced, but not enough of it), try to avoid trading for it unless absolutely necessary.

You can research excavation under the industry tab, which will increase the amount of your produced resources by 10% for each tier, up to 50% bonus if all tiers of excavation are researched. This will free up your civilian factories from trade and allow you to construct more buildings. When there is a lack of material, remember to check what is being produced.

It won't do to have too many different recruits going at once (i.e both motorized and infantry) if what the factories are producing is going toward upgrades. An example would be to trim away motorized infantry for a while and focus on just regular infantry.

If one lowers the production of motorized and focus that on upgrading an existing unit, the free factories can be moved to infantry equipment and by extension allow for the production of more units. When is low, remember to change your conscription law and try attaching Field Hospitals as support companies or disbanding units you don't need, including air wings and ships. If you must maintain a large front and can't afford to reduce the number of divisions you have, you can consider making them smaller.

Quite often you can afford to remove one infantry battalion from your default divisions and they will perform almost the same. Keep in mind that the Total Mobilization (Economy Law) gives you -3% recruitable population and generally isn't worth having, unless you can spare the manpower. The Mobile Warfare and Mass Assault Land Doctrines, as well as the Nationalist branch of the general National Focus tech tree give bonuses to your manpower pool. If you have concerns about your manpower in the long run, consider creating high-tech divisions with advanced equipment. Higher production cost is generally linked with manpower preservation - an infantry division will lose a lot more manpower than a mechanized division.

Mountaineers and Marines will save you a little bit of manpower, compared to regular infantry, if deployed properly in their respective fields, due to their combat bonuses in mountains/hills and river crossings/naval invasions, as well as their slightly higher breakthrough stat, and they only cost more Infantry Weapons and training time to produce. Doctrines should be picked carefully and with consideration. It is possible to switch from one doctrine to another, should the need arise, but it takes a long time to research them and you will lose the old doctrine.

The good part about doctrines is, that they don't require production and the bonuses come into play as soon as you research them. There are about 10 separate researches in Land Doctrines, 12 in Air, and 15 in Naval. The base cost is 300 days for Land Doctrines and 200 days for Naval and Air Doctrines, so it will take considerable time to replace a fully researched doctrine.

Use caution should you decide to make drastic changes. Remember to update and research and produce the next tier of equipment for units you find lacking in quality. Sometimes an upgraded version of a unit has a lot more hidden bonuses than one might expect. Different Factions have different disadvantages and advantages when it comes to securing resources. The Allies begin with the majority of Rubber production, and anyone going to war with them will have serious troubles with securing rubber without a plan to attack Allied South-east Asia, or without a lot of Refineries. Rubber is needed for all aircraft, as well as motorized/motorized artillery and mechanized. The most of the world's Chromium can be found in the Soviet Union, Turkey, South Africa, France, Cuba and Yugoslavia.

Chromium is needed for ships and heavy tanks, as well as modern tanks. The only ships that don't require Chromium are Destroyers I-III, Light Cruisers I-III, Heavy Cruisers I-III, Submarines I-III. If you want to maintain a fleet of capital or modern ships, you will need to secure those places for yourself, or as allies.

Aluminium can be found in France, the United States, Hungary, the Soviet Union, Yugoslavia. Aluminium is needed for all aircraft, as well as support equipment. When planning your strategy you have to plan to either skip mass production of units requiring resources you don't have, or to plan to steal those resources from the enemy to secure your production or deny the enemy production of a particular equipment type. If you are playing as a minor nation, you might want to consider which side to join, if any, depending on the resources you will need to power your economy.

Hoi4 Best Division Template

Naval and Air combat seem confusing at first, but with a bit of research and understanding, turn out to be simpler than Land combat. Look up an in-depth guide if you have problems with Air or Naval battles and/or strategy.