However, you need to get to War Economy as fast as you can you can do this when your war support is high enough or when the German War Economy national focus becomes available (this will also give you more military factories). Moreover, Heinrich Himmler is worth getting as he slightly increases your manpower as well as the Captain of Industry, War Industrialist and Heinz Guderian as a military theorist. In terms of political power, go with Industrial Concern (IG Farben) and military advisors that come with Army Innovations and Air Innovations. This will ensure that the German Reich in Hearts of Iron IV will have a sufficient amount of aircraft and ships in your arsenal. Despite this order of national focuses seeming long-winded, it gives you plenty of time to build up your industry before you go to war with the Allies. For your land divisions, try and have 14-16 infantry on the French border 24 divisions (16 infantry and 8 tanks) on the Belgian border 24 divisions (16 infantry and 8 tanks) on the main Polish border and 10 infantry divisions on the Polish border in Ostpreussen (try and build level two forts if possible).
By following these rules below, the chances of securing the fruits of war will dramatically increase and your journey towards global domination will be one step closer.
As with our Soviet Union guide, I will provide some general rules that you should follow even if you decide not to adopt my military tactics.