When the Soviets invaded in November 1939, the Finns, led by Marshal Mannerheim, defeated the Red Army on numerous occasions, including at the crucial Battle of Suomussalmi. These successes were in large part thanks to the application of motti tactics. While the Finns ultimately lost the war and were forced to agree to the Moscow Peace Treaty, the Soviet objective of conquering Finland failed, in part due to the threat of Allied intervention. During the war the Finns lost 25,904 men, while Soviet losses were 167,976 dead.