vounteers in the military give up a lot more than as far as I know most all others.

first off they can't quit their job, or guess what they go to jail.
they follow the U.C.M.J. Uniformed Code of Militray Justice.
Uniform Code of Military Justice - Wikipedia, the free encyclopedia
when a military member volunteers he/she is saying that if someone above me orders me to do something I will.
they are held to a much higher standard.
once you enlist you become military property

all that and plenty more are things everyone has to deal with when joining the military.

during a time of war, why is that more of sacrifice I think those reasons are obvious

leaving the nice cushy U.S. for extended periods to go to exotic locations like Iraq, Afghanistan, Horn of Africa.
missing the important moments at home like when your kid starts walking/talking, and things like that

does that mean that those others don't make sacrifices, no but nowhere near the same as a militray member