1-) Fighters. One of your first researches should be Fighters and you want to start building them very early on. You should expect between 1000 and 2000 fighters thrown against you when war breaks out in 1939. Less important for Japan or US.

1. Heart Of Iron 4 Guide

2-) 1936 light tank models. That should also be one of your early researches and you should also start building them fairly early. Moderate amount of early light tanks is much better than a few modern medium ones. Don’t strangle your economy trying to get 1939 or 1941 models too early.

3-) (Almost) all focus tree unlocks take 70 days. Use that to plan your first few years. Know where you want to be on the tree when war starts.

In the south, Albania, Hungary and Czechoslovakia decide to appease the fascists. This is Hearts of Iron IV and, not for the first time, I’m wondering if playing as Poland my first time through was a bad idea. Hearts of Iron IV is the newest installment in Paradox Interactive’s long-running wargame series. Patches: Each release of Hearts of Iron 3 has patches specific to that release, with the last patch for the 'vanilla' game being 1.4, the latest patch for Semper Fi being 2.04 and for For the Motherland being 3.05 (note: the original 'Hearts of Iron 3' game is referred to. This guide assumes you have finished the in-game tutorial with Italy. Unlike other Paradox games where the larger army usually means victory, Hearts of Iron IV is much more complex. Although it can be successfully played by massing infantry, at least in singleplayer, a few tricks will make your singleplayer experience easier and also teach you some basics of the game.

4-) Extra research slots and extra factories (civilian > military >>>>>> dockyards) should be your first goals. Keep in mind that diplomatic focuses that allow you to annex other countries will often provide a lot of factories as well.

5-) “Consumer Goods Factories – x%” basically gives you free civilian factories. Look up the tooltip for that after pressing “T”.

6-) Spending 1st year building only civilian factories is not a bad idea. Do not neglect your Industry and Engineering research.

7-) Changing what is produced by a production line will reset your efficiency to 10%.

8.) Production lines that aren’t getting enough resources will still produce things, but slower. Hover over to see details.

9-) Upgrading our production line from lower tier of the same production (Infantry Weapons I to Infantry Weapons II; Light Tank 1934 to Light Tank 1936; Fighter I to Fighter II etc.) will only cut your production efficiency in half.

10-) Switching production to an Exp modified variant of the same equipment will only lower your efficiency by 10%
Naval production doesn’t use efficiency.

11-) Think on what do you want to use your research bonuses. They can be sometimes instrumental in getting a very important tech ahead of time on a cheap.

Download age of mythology free. 12-) Some research bonuses are very specific. If you have something that cuts your Recon I and II research in half don’t go researching those without it.

13-) Synthetic Refineries are only worth it when you can’t buy the resources. Civilian factories are cheaper, you can buy more of the resource using them and they have other uses as well.

14-) You can mostly ignore higher levels of Syntetics techs, they just allow you to build more Synthetic Rafineries per state. Do not build those in occupied territories.

15-) Try not to buy less than 8 resources/factory, especially early on.
You are exporting automatically. Nothing you can do there, just enjoy free civilian factories if they appear.

16-) Resources are extremely important. Keep them in mind when planning your conquests.

17-) Do not mess with your trade laws if you don’t know what you’re doing.

18-) You can change your recruitment laws at any moment and your manpower pool will fill up in an instant. No point doing that ahead of time. Do keep in mind that it costs Political Power, tho.

19-) Once World Tension reaches 25% democracies will start guaranteeing nations you justified wars on. Either do the invasions before that happens or be ready to face both France and the UK. At that point the invaded nation will (almost) always join one of the other factions. In some situations it may even mean bringing a new one into war against you.

20-) Don’t forget about your police forces. Use Cavalry units with Military Police brigades (you can add those later) and garrison them in occupied territory.

21-) If conquered nation doesn’t belong to an existing faction (like Allies or Comintern) there will be no resistance. That makes invasions before 25% tension and diplomatic annexations very powerful.
You first use of accumulated Political Power should be switching to War Economy, if possible.

22-) Your second, in most cases, getting a guy that will increase a speed of Civilian Factory construction or increase Political Power gain.
Production companies are nice, but don’t try to get them too early, other bonuses are usually more important.

23-) Researched equipment will gain bonuses from production companies that are hired by you when the research ends. You don’t have to have them when you start the research.

24-) You should try to keep researching Land Doctrines, especially early on. They grant superb bonuses and its good to have as many of hem as you can when the war starts. It is, however, ok to switch to other techs is they seem more crucial at the moment.

25-) Do not ignore encryption and decryption.

26-) 6 months ahead of time is a good moment to start thinking about researching some very important techs. Try to keep that to a minimum tho.

27-) You can live without Self-Propelled Anti-Air/Anti-tank/Artillery.
Best Anti-air equipment (on installation) is few hundered Fighter planes.

28-) 2-3 levels of Radar instalations in your frontline (air-wise) provinces will help you win air superiority.

29-) Agility and speed are two most important stats for fighters followed by range.

30-) Motorized and Support Equipment never get old. When in doubt produce some of those.

31-) Bombers are nice, but Fighters are nicer.

32-) Take your time to familiarize yourself with the airforce interface. It gets better.

33-) You can delete all the airwings and remake them without losing anything.

34-) Naval Bombardment is broken. AI can’t deal with it.

35-) You can stop units than embarked on a boat by pressing “H” or a “Hold divisions” button. pressing on a port province they are moving out from doesn’t work (in press version).

36-) Ports are considered a part of land province. Keep your navy out of range from enemy bombers or keep air superiority in their port region.

37-) Battleplan system starts to make a lot of sense ~80 hours into the game.

Heart Of Iron 4 Guide

38-) 4 tank battalions and 2 motorized infantry battalions make a good panzer division.

39-) Recon is the most important support battalion.

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