Yes. If you own only the original game, you'll be able to play online as the Americans and the Wehrmacht found in Company of Heroes. If you venture online, you'll be able to play against not only the original Axis/Allies teams, but the Opposing Fronts armies as well.
However, you can not play as them. If you own only Opposing Fronts, you'll be able to play as either British or Panzer Elite, and you'll be able to play against the British, Panzer Elite, and the Axis and Allies from the original game. However, you'll only be able to play as the British or Panzer Elite.
If you own both Company of Heroes and Company of Heroes: Opposing Fronts, you'll be able to play as and against any of the four armies. However, mirror matching is still not allowed. Meaning you'll still only be able to play as Axis vs Allies.
More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.