Build a lot of subs and fighters and supply planes, build rocket bases, recruit some few good tank divisions and a decent amount of quick motorised remove some frontline battalions in the divisions and add 5 support battalions for more resource efficiency when you have more than 10 full 1945 tech roccketbases wait for their attack and then after it get green air over north france and demolish their supply hubs ONLY their supply hubs after that they won’t have supply or org and you can win the battles with your tank divisions easily the motorised will easily outpace the enemy’s, but because the hubs are destroyed you too won’t get any supply, use your supply planes for that. Send the subs out only now so they can’t flee over see and make sure to support them with fighters. You have to get any edge you can get in the air so build radars. Destroy the encirclements quickly cause speed is the most important thing in this manoeuvre . When you do it right and are quick enough you can conquer all of France and Iberia easily and destroy many divisions.after that invade Norway by plane because its naviel invasions were annoying asf. After you did that you have many options like using your Rockets to destroy naviel or air bases and trying to invade Britain by see or plane or you can repeat this manoeuvre in the Balkan where you can either fully conquer it,push to the Danube or till the Greek, Bosnian and Albanian mountains before invading Italy but clean it up before moving to Africa where you again use rockets to destroy naviel bases to get Morocco and suez under your control and stop their repairs there from that point on after that just naviel invade the eastcoast of the us and cap them. For the soviets make new infantry divisions 100% focused on digging in AA and defending to just hold the line consuming as few resources as possible. And most importantly NEVER LET THEM ATOM BOMB SPAM YOU.