In February 1943, the army fought in the Battle of Krasny Bor. The army was the left pincer of the offensive and was to attack out of Kolpino and destroy the Blue Division at Krasny Bor, then advance southeast to Tosno. A division-size attack on 8 February forced several Blue Division outposts back. On 10 February, the 55th Army attacked simultaneously with the 54th Army. The 55th Army attacked along a front of 14 kilometers, concentrating three rifle division and a tank brigade against one regiment of the Blue Division. The Soviet troops broke through the Spanish line and the army's 63rd Guards Rifle Division advanced into and captured Krasny Bor. On the army's left, its 43rd Rifle Division attacked a regiment of the SS Polizei Division, but was unable to advance. German reinforcements arrived and formed a new defensive line south of Krasny Bor, stopping the advance of the 55th Army. The army brought up its tank units and resumed the offensive towards Mishkino on 17 February but was again repulsed by Tiger tanks of Panzer-Abteilung 502. During the offensive, the army advanced five kilometers and suffered more than 10,000 casualties. The army inflicted 3,645 casualties on the Blue Division. On 19 March, the army attacked again in conjunction with the 8th Army, but was forced to retreat by counterattacks from Legion Flandern and Panzer-Abteilung 502.