My grandparents fought with Tito's partisans in Yugoslavia. One of my grandfathers and his entire male family were members of the 6th Montenegrin Assault Brigade from July '41 until the end of the war. My other grandfather was first a reservist in the Royal Yugoslav army in April '41. After the Yugoslav surrender he went home but was injured by a strafing German or Italian aircraft. He didn't recover until that winter when he joined the 9th Montenegrin Brigade. He was injured two more times in Northern Montenegro and on the Kosovo and fell ill with Typhus before his unit was disbanded at wars end. neither of them were members of any communist organizations, they, like most people fought with Tito because he was the only no-compromise resistance to German and Italian occupation. The Royalist Chetniks were reliable and tough against the Germans but often cut deals with the Italians.