I do not think it is really all that acceptional. Many people will give up liberties, luxury, and/or life for what they believe in and sometimes in what they don't.
Whenever one marries they give up some liberties, marriage is a series of compromises.
Luxury is oftentimes also willing given up for many reasons.
Life is definately the rarest of this to be given up. But I am not sure that many people join the army thinking they will die. They don't think it can happen to them. that it will strike others. or that is how I have percieved many that I know went into the military thought.
Personally I am taking this more as an impersonal debate then anything. discussing exactly what a soldier does and what it qualifies as is not truely bashing, rahter it may help broaden the views of some, or to help refine our overall definitions.
P.S. I need to take a shower so I didn't bother listing everything people do that limit liberties, and/or luxury, etc.. I am certian if you think about it you can find them.
Oh yes one last thing, most people I know go to the military for money, and college stuff... thus they aren't giving it up for thier country, rather for the benefits THEY can gain. They openly admit it to me.. they would not go to the military if the benefits weren't there. only if American soil was attacked would they be willing to fight.(about 6-7 people that I know have joined the military since afghanistan.. and the reason they went was for the education money.. they were hard up on cash.. and they figured this would be a good way to get it. Defending the country may have helped but the benifits is what hooked them)