If the Vietnam war is your particular interest, try:
Thirteenth Valley
(ISBN 10: 0553235605 / ISBN 13: 9780553235609 )
del Vecchio John M.
I was put on to it by an American I met back in the 1970s. He had served with the author in the Au Shau valley fighting and said that, although a fictional account, it was very close to what actually happened. As an ex-Huey driver myself, I was gobsmacked to read of some of the things the US Army Huey drivers did with their aircraft in the Au Shau. Balls of steel.