From June, 1942 until March, 1943, the division was assigned and reassigned among several armies within Western Front. From August to December it saw action in both the First and the Second Rzhev-Sychyovka Offensive Operations while serving in 31st Army. While 31st Army gained some successes in the summer offensive, the story was quite different come November. The plan for Operation Mars called for the divisions on the left flank of the Army to support the main thrust of 20th Army towards Sychyovka by attacking through the valleys of the Vazuza and Osuga Rivers. The 88th, 336th and 239th Rifle Divisions (north to south) would be supported by the 32nd and 145th Tank Brigades. But when the attack opened on November 24 it was a costly failure. In spite of an apparently effective artillery preparation the defenses of the German 102nd Infantry Division remained largely intact, and inflicted infantry casualties of as much as 50 percent on the attackers, while also decimating the tank brigades, and effectively ended 31st Army's participation in the offensive. In one day of combat, the 336th lost 749 men killed and 2,297 wounded, for a total of 2,946, among the highest casualties in Operation Mars in such a short period of time.