How do you gays pvp in hoi4?

Hello everyone I'm a Hoi 4 player from China and this is my first post in Reddit.I don't speak English very well, so if something is wrong please point it out!

I'm curious what rules you guys have when you pvp in the US and how you would combat. The most common historical board regular in China would be Germany, Italy and Romania against the US, UK and USSR. The Axis' victory condition is to take three large Soviet cities, and the Allies need to defeat Germany before the Axis can accomplish this.

And the main focus in such a match-up would be the clash of the main forces between the Soviets and the Germans and how Italy could help the Germans defend the Atlantic line. The main forces we would make are tanks with IFV or infantry.

And there are some changes in force formations during landing and counter-landing operations, as shown in the diagram above

I've recently heard of a playstyle where all the mains are special forces infantry that is popular in the US, I wonder if that's true. And it seems like 20 infantry is a common playstyle, which is unthinkable in my pvp game here. I don't know how you guys would pvp, would love to hear what you have to share!