The Continuation War was a conflict fought by Finland and Nazi Germany, as co-belligerents, against the Soviet Union (USSR) from 1941 to 1944, during World War II. In Russian historiography, the war is called the Soviet–Finnish Front of the Great Patriotic War. Germany regarded its operations in the region as part of its overall war efforts on the Eastern Front and provided Finland with critical material support and military assistance.
The Continuation War began 15 months after the end of the Winter War, also fought between Finland and the USSR. There have been a number of reasons proposed for the Finnish decision to invade, with regaining territory lost during the Winter War being regarded as the most common. Other justifications for the conflict included President Ryti's vision of a Greater Finland and Commander-in-Chief Mannerheim's desire to liberate Karelia. Plans for the attack were developed jointly between the Wehrmacht and a small faction of Finnish political and military leaders with the rest of the government remaining ignorant. Despite the co-operation in this conflict, Finland never formally signed the Tripartite Pact that had established the Axis powers and justified its alliance with Germany as self-defense.