One of the greatest movies of all times, "The Best Years of Our Lives" (1946), is about the struggle three soldiers have when then return home from war. It won 7 Oscars including Best Picture. If you haven't seen it, check it out. You'll be entertained and moved.
My favorite line is when an angelic young woman falls in love with one of the soldiers and believes she'd make a better wife than the one he has: "I've made up my mind....I'm going to break that marriage up!"