Sgt. Fury and His Howling Commandos #45 is officially entitled "The War Lover" and is described on Wikipedia as "shaded exploration of a trigger-happy soldier and the line drawn, even in war, between killing and murder. Daring for the time, when majority public sentiment still supported the undeclared Vietnam War, the story balanced present-day issues while demonstrating that even in what is referred to as "a just war", a larger morality prevails."

This is true enough. What Wikipedia *doesn't* mention is that it is also a very touching tale of Dum Dum Dugan's devotion to his fedoras.

Witness! ( Rather a lot of fedora scans )