Harrison and 30th Division returned to the front lines following the launch of the massive German offensive in the Ardennes on December 17, 1944, and participated in combat in the Malmedy-Stavelot area. Hobbs tasked Harrison with the command of the task force, consisting of the 119th Infantry Regiment, which later repelled a German assault at La Gleize. Harrison and his task force destroyed or captured 178 enemy armored vehicles, including 39 tanks.
