What is your favorite part of history to read/learn about?

Vietnam War. I have quite a bit of books on it. A few on WWII but I never got real big into it. Mostly 3rd Reich and Bataan stuff. I guess I like the jungle warfare aspect of it.

My grandfather served but never talked about. The only thing I ever learned from his experience was that his best friend was killed right beside him. They were fighting the enemy alongside each other and decided to switch places. He saw his best friend die immediately after. He told my mother and she told me so it was never a topic he discussed or wanted to.