Operation Bagration was the codename for the 1944 Soviet Byelorussian strategic offensive operation, a military campaign fought between 22 June and 19 August 1944 in Soviet Byelorussia in the Eastern Front of World War II, just over two weeks after the start of Operation Overlord in the west. It was during this operation that Nazi Germany was forced to fight simultaneously on two major fronts for the first time since the war began. The Soviet Union destroyed 28 of the divisions of Army Group Centre and completely shattered the German front line. The overall engagement is the largest defeat in German military history, with around 450,000 German casualties, while setting the stage for the subsequent isolation of 300,000 German soldiers in the Courland Pocket.