The Daily Beast Photo Illustration by Luis G. Rendon/The Daily Beast/Courtesy of Troy OffenbeckerTroy Offenbecker, a former U.S. Marine who has been fighting against Russian forces in Ukraine since June of last year, was supposed to be on a break.He’d been fighting with the 3rd Bbattalion of the Ukrainian Foreign Legion and had taken several days off to try to decompress last week. Then his buddies in a different unit—the 1st Battalion—called him up to see if he wanted to attempt an assault on Russian forces ne