Mparro
They thought war was over. When they make new technology the war gets advanced. They can't let their country down. When they put on the new technology war is a new story. His team leaving him? A random person helping him it just doesn't make sense. Maybe it's a test maybe not.
His most trusted team mate punching him. The guy that saved his life knocked him out.
Ch.1,and 2 won't have the new technology.