People routinely refer to our troops in Iraq as heroes. What is heroism in an unjust war?

Charley Gibson of Good Morning America, as so many news people do, referred to our troops in Iraq as heroes. I flinch when I hear that. Can we give blanket praise to all who are fighting in this unjust war? Some have probably performed heroic deads. Others have committed crimes against the Iraqi people, and have done it with the blessing of the U.S. government.