Military volunteerism saves civies from being drafted as cannon fodder

One reason to volunteer is to save others from being drafted as http://en.m.wikipedia.org/wiki/Cannon_fodder.

Cannon fodder is an informal, derogatory term for combatants who are regarded or treated as expendable in the face of enemy fire. The term is generally used in situations where combatants are forced to deliberately fight against hopeless odds (with the foreknowledge that they will suffer extremely h…