Chapter 18

In this chapter Henry comes upon a wounded soldier named Jimmy. Jimmy was wounded and so Henry was trying to find water but there was no water to be found. At the same time the rebels had started up again. Henry's regiment was told to line up and be ready to fight. Henry over heard his commander talking and he had mentioned that they may not make it out alive. After that said Henry and Wilson both look at each other and they are ready to fight. 

Why wouldn't they make it out alive?