Born out of a desperate need to defend the Motherland, Stalin enlisted the ideas of an American engineer, J. Walter Christie, to develop in total secrecy one of the most formidable tanks in history. In 1941, straining under Operation Barbarossa, Stalin ordered his new weapon into the fray and changed the course of WWII. Using detailed reenactments and interviews, we reveal what life was like inside Russia’s “secret” weapon, the T-34, and the horrifying reality of combat on the Eastern Front.