I hate to brake it to you but in order to become a ranger especially a ranger...you need proper experience in ecology...or have earn a Bach in Ecology...if you just want to work on the trails and be a grunt I pretty shore you can get one...you have to remember that most parks or gov owned...you the sheriff if you a ranger you need to know what to do....sometimes...like I was 20 miles away from Jackson the closest city were I happen to be and the camp was 5 mile hick to the car.
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.