The MOST you will get is a guarantee that the two of you will start boot camp on the same day. There is no guarantee that you will finish at the same time or be sent to the same school or be stationed together, It used to be called "buddy" enlistment but I don't know the current terminology.
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.