Some of the greatest war movies ever made, from Atonement to The Deer Hunter, contrast the horrors of warfare with a heartbreaking love story. As the saying goes, all’s fair in love and war, and Hollywood loves combining those two subjects in a movie. War can make an interesting backdrop for a romance, because it juxtaposes two people finding a kindred spirit in one another with conflict and disagreement on a global scale. War can tear couples apart if one of them is drafted to fight or their town is subjected to an invasion. It’s the ultimate example of a romance being tested by forces out of the lovers’ control.

https://screenrant.com/war-movies-love-story-romance-saddest/