actually, apart from being in the infantry, mortality risk for servicemen overall are as low or maybe lower than the USA population as a whole…

http://www.beforeyousignup.info/joining/army/54-danger

but as dangerous jobs go, military is not very dangerous…

http://www.fool.com/investing/general/2014/03/15/dying-for-a-paycheck-these-jobs-are-more-dangerous.aspx