Stalin was determined to win the war with the Finns before foreign aid could have any lasting effect. He brought up more soldiers and many more artillery guns, and began a new offensive on February 1, 1940. By March 7, the Finns asked for an armistice. Stalin accepted on March 12.
In France, the Daladier government fell after promising to prevent the Finns from succumbing to their foes. A new government under Reynaud was formed and pledged to prosecute the war in the West against Germany with even more vigor.
Finland’s border with the Soviet Union was set back to the time of Peter the Great in 1721. She lost the Karelian Ithmus. Months later, she let German troops pass through on the way to invade Norway. Many units remained, and jumped into the Soviet Union from Finland in June 1941. Technically neutral, strong anti-Soviet feeling led the Finns to allow the troops to advance.
Britain declared war on Finland on December 6, 1941. The United States, recognizing that Finland was not an ally, seized Finnish ships. Throughout the war, German planes attacked Murmansk and Archangel from Finnish airfields. German and Soviet units engaged frequently in Finland. Finland was clearly on the side of the Axis.
In February 1944, US secretary of State Cordell Hull informed Finland that continued support of Germany would result in serious consequences. As Soviet soldiers advanced in September 1944, Finland sought an armistice with the Allies. She declared war on the Axis on March 3, 1945.
After the war, the Finns were forced to give up much of the same territory that she lost in 1940.