Here's my own formulated Strategy, I find games to be funner if you throw away the guides and explore for yourselves.
Step 1: Industry
Because you know that if the Krautz get through your Defenses, your Main Land France's Industry is in Peril, so amass Industry in the deep plains of Africa and all over Siam(South Eastern Asia). No, don't just build a few factories here and there, I'm talking spam Factories until your own Industrial Capacity is burning.
Step 2: Defenses
Of Course, IRL, the Maginot Line did it's job of deflecting Krautz, but all it really did was move the Germans through Luxemburg, Belgium, and all that good stuff and placed them directly above Paris. I know of 2 ways to defend yourself on Land from the Germans.
Step 2 Part A: Maginot Line
Make it bigger. This is quite obvious in my opinion. But for the sake of time, do not try to max out Forts on the Luxemburg and Belgium border, instead build 5 > Forts on those border provinces and you are good to go. When the Germans attempt to blitz you, they will be bottled down in a Trench-Like war situation, with their troops on their forts, and your troops on your forts. To break this stalemate, either send 10+ Divisions of Marines by sea behind enemy lines, cut their supplies, and move your Maginot Garrisons up. Or you can send 10+ Divisions of Paratroops from above down behind the Krautz, and do the same thing.
Step 2 Part B: Guerrilla Warfare
Instead of building a new Maginot line, simply place Divisions of troops deep in your territory. When the krautz break through, and they will, harrass them with 1 Division at a time, and while they're busy, of course, cut their supplies and move your main army for the kill.
Step 3: Counter-Offensive
Once you've halted the Krautz, blitzkreig through to Germany from Switzerland upwards or Italy upwards, or you can of course just charge for Berlin herself from the Maginot line. Either way, once your Zerg Rush captures Germany, annex, and go for the Baltic States.
Conclusion:
From here on, it's your choice.