World War II: During the Continuation War, the Soviet Union demands unconditional surrender from Finland during the beginning of partially successful Vyborg–Petrozavodsk Offensive. The Finnish government refuses.

The Continuation War, also known as the Second Soviet–Finnish War, was a conflict fought by Finland and Nazi Germany against the Soviet Union during World War II. It began with a Finnish declaration of war on 25 June 1941 and ended on 19 September 1944 with the Moscow Armistice. The Soviet Union…