The United States (of America (seriously where the ♥♥♥♥ else would the be))
The USA is pretty dope and can produce a lot of good schtuff and make a lot of boats. Basically just make more boats than Japan and make a couple of decked out destroyers to wreck subs or else ur gonna get sunk and (if in multiplayer) 10 year olds are gonna ♥♥♥♥♥ at you for hours about how their 40 width tank divisions keep getting sunk and they can't trade. Nobody wants that.

The United Kingdom (of Great Britain and North Ireland and a bunch of other ♥♥♥♥)
Build boats if the USA doesn't... but they're called SHIPS Jimmy not BOATS!!!1!... cool I don't care they're mother ♥♥♥♥♥♥♥ boats with guns idc what you call them, if you wanted a realistic game you shouldn't play hoi4. With that out of the way, as UK, build a LOT of planes too. If you're considering whether to assign more factories to planes, put 5 more on until you have so many planes that you have a literal aneurysm putting them in groups of 100. (pro tip, put them in groups of 800 and then split them). Also, defend your islands because if you don't you are gonna get banned from multiplayer and if you get invaded as UK in single player you might want to consider playing an easier game like tic-tac-toe or water bottle flip because I'm not even sure if it's possible to be any worse at this game.

France
Don't build factories in mainland France.

bUt i CaN hOLd gErMaNY!!

no you can't and if you do I just wasted 3 hours of my time building up my country for Germany to fail like a tard

don't give Hitler free factories

don't....

Canada
Kinda fun in single player. Multiplayer you get a ton of planes sent to you and people expect you to just sit there the entire game putting them in groups of 100 and then do nothing for the rest of the game. What, you wanted to micro divisions? No, only planes for you.

Canada Fact: If you play this in multiplayer you are fun at parties

South Africa
Build 2 or 3 heavy tank divisions that inevitably get sunk bc the USA player is drunk and doesn't care about protecting convoys.

New Zealand
Do whatever you want. One of the fun countries to play in Multi bc there aren't sweaty ♥♥♥♥♥♥♥ breathing down your neck for massive game changing errors like forgetting to block a seazone and having 3 convoys sunk or being 10 days late on an attache and missing out on 3 army XP (devastating).

Australia
Pretty much just have to hold Malay and don't get invaded. I think there's some research you have to do, but you'll be told at least 75 times by the UK what you have to research so there's no reason to memorize it.

India (or Raj same thing)
Don't get invaded by Japan and help in Africa a little too. Seriously, that's it. Have good infantry don't die and you are professional E-sports ready raj player.

Brazil
Basically New Zealand but in South America. They can make marines.

Make sure you build plenty of modern planes to counter the German air force. You need to hold France until at least 1940 and inflict some casualties on them or else they snowball with added baguette factories.

3000-4000 Interceptors and some CAS is a good number to aim for for battle o' France depending on SP, Mp or what rules and ♥♥♥♥ you play on.

So you're about to fight the axis armor and from all of the comments you've read on YouTube and reddit from dudes with Erwin Rommel profile pictures they seem pretty scary. Well thats just boofus and incorrect, just like real life they're about equal to yours.

"Omg THE GERMAN BLITZKRIEG wahhh idk how to destroy THE TANKS."

think about what you just said

think...

okay since you're probably illiterate you don't even realize you answered your own question

just like how you use a phone charger to charge your cell you use tank destroyers to destroy tanks.

just throw a few of those mofos in and you will rock those Panzers

Yep, we've all seen it. It's pretty scary and gives Hitler a 25% political power boost. It is one of if not THE most powerful moustache in Western Civilization during this time period so just be careful.

Unfortunately the devs have not added in an espionage mission to shave Hitler's moustache so ur just gonna have to deal with it k?

Oh no, Poland got invaded and now France is falling. Hopefully the France didn't build factories in mainland and made a couple of tanks. Hopefully Germany doesn't roll you immediately and if they do it makes it hard because Germany becomes an uberpowered industrial menace.

Don't lose divisions in France if you're UK. That ♥♥♥♥ should be in Suez or on Gibraltar anyways.

So your USSR built only infantry because he thinks he's cool and HEhehE LoL gUys I hEld fOr tHrEe YEaRs heHEHehE.

I don't know why these people exist but since Germany only really needs to send a few tank divisions and some spare butter to go defeat Russia all of his sweet ass Panthers and fully modded tanks are sitting on the coast of Normandy.

Please make sure the USSR actually builds stuff or you're gonna see the German defense of France and wish you'd just played an actual fun game like Counter-Strike or Rimworld instead of spending 5 hours in a ww2 simulator with a bunch of mic spammers.

Don't lose Egypt or the game gets way harder. Preferably take Libya but if you don't then all the Italians go to Northern France and you have to fight through a million conscripted Papa John's workers and it can be super hard to push deep into occupied France.

Otherwise you can just bum rush Greece and make the Italy want to commit suicide trying to push you out of the mountains.

Since Japan is super irrelevant and kinda does their own thing, it can be easy to forget about them and then realize the Pacific has been wiped out by weaboo squadrons and all of your ♥♥♥♥ is on fire.

Hopefully the Raj doesn't fail and does a good job or else you're gonna be cursing his family while you send a bunch of units over there meant to liberate Europe.

Send units to defend Singapore and coordinate with the UK, beat Japan's trash fleet with your supeior murican fleet and then worry about the real war with Hitler

What would a strategy game be without the most strategic unit; strategic bombers that is.
If they're allowed or you're in singleplayer, use them and watch the Axis industry disappear and take excitement in knowing that in your fictional HOI world some fat sweaty wehraboo with an Erwin Rommel profile picture will comment about how the allies were war criminals for how badly you obliterated them.

Target MIL industry for weakining production (obv), but if axis is already struggling with supply in the east just bomb the infrastructure on the Eastern Front and watch the Wehrmacht starve to death.

The big battle for Europe has begun

How do we secure the beaches?

Well first you gotta get air superiority and if you can't you might as well quit because you need that to win so just press ALT + f4 you're gonna get the same result either way (LOSING haha).

Aim for 75% air superiority and get 1500-2000 CAS ready to go.

If you're extra spicy go for paratroopers to land behind the lines and on airports to mess with luftwaffe a little bit.

Get battleships for max shore bombardment and land on the 2 tiles next to the port as well as the port and make sure you have 50+ divisions on Britain to reinforce.

Go for a higher level port and try to take 2 within the first week of the invasion to support getting armor into the fight without draining all supply.

it might take a bit to melt 'muh supeior krup concrete bunkers' but they'll be taken down in a few days.

Even with decent AA, CAS will still obliterate because you have so much focused on 3-4 attacks.

Congrats. You managed to beat 3 economically inferior Major powers with your overwhelming amount of manpower and industry. It's almost like you're destined to win.

Now create ugly borders with the axis countries and prepare to fight a cold war I guess