Operation Doppelkopf (German: Unternehmen Doppelkopf) and the following Operation Cäsar were German counter-offensives on the Eastern Front late in 1944 in the aftermath of the major Soviet advance in Operation Bagration with the aim of restoring a coherent front between Army Group North and Army Group Centre.The operation's codename was a reference to the German card game Doppelkopf.