You generally never want to include . Cpp files! Also, you should get used to factoring your code according to dependency hierarchies which shall not include any cycle!
For small proframs this is just helpful, for large software it is essential.
The problem is that you've included . Cpp files, that's why you had to tell Visual Studio to pretend that these files were not "source" code, because it always compiles source code files. So the simple solution is don't do that.
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.