After two weeks of delaying actions and counterattacks, Finnish forces had now reached the prepared main defense works known as the Mannerheim Line. However, the defenses at Kirvesmäki, consisted of little more than barbed wire and a few old concrete strongpoints. Having taken up the front line positions at Kirvesmäki three days earlier, 1st Battalion, Infantry Regiment 30 prepared to meet the Soviet attacks without any anti-tank weapons except mines, Molotovs, and explosives. On 15 December, after a three hour artillery preparation, the Soviets attacked with an infantry regiment supported by 30 tanks.
Attacker: Russian (49th and 150th Infantry Divisions, and 39th Armored Battalion)