I was reading about Richard Schirrmann in Wikipedia. Here is an interesting story from World War I:
In December 1915, “When the Christmas bells sounded in the villages of the Vosges behind the lines .. something fantastically unmilitary occurred. German and French troops spontaneously made peace and ceased hostilities; they visited each other through disused trench tunnels, and exchanged wine, cognac and cigarettes for Westphalian black bread, biscuits and ham. This suited them so well that they remained good friends even after Christmas was over.” Schirrmann was in a regiment holding a position on the Bernhardstein, one of the mountains of the Vosges, and separated from the French troops by a narrow no-man’s-land, which his account says was “strewn with shattered trees, the ground ploughed up by shellfire, a wilderness of earth, tree-roots and tattered uniforms.” Military discipline was soon restored, but Schirrmann pondered over the incident, and whether “thoughtful young people of all countries could be provided with suitable meeting places where they could get to know each other.”
Have you seen times when people who are supposed to be "enemies" get together on friendly terms in a hostel?