Through April and June it operated three marshaling camps in southern England, providing accommodation and administration for combat troops being prepared for the Normandy landings.

After a brief retraining period, the battalion landed in Normandy on 8 August, equipped with M10 tank destroyers, and was assigned to XV Corps.

It entered combat on 17 August, fighting at the southern tip of the Falaise pocket outside Argentan; over four days it accounted for 41 tanks and 80 other vehicles, and was awarded the Presidential Unit Citation.

It was briefly in the line outside Metz, holding defensive positions, but was withdrawn on 7 November (being replaced by the 818th Tank Destroyer Battalion), and moved northwards to join the 90th Infantry Division.

It supported the push into the town on 15 December, but with the German offensive in the Ardennes the bridgehead was evacuated, and the 90th Division established defensive positions on the west bank.

On 1 April, it arrived in Bad Hersfeld and moved east towards the Czech border; a company was left in Merkers to provide security for the salt mine there, which contained the German financial reserves – a hundred tons of gold, as well as a large amount of looted artwork.