Denny was assigned to the 2nd Battalion, 506th Parachute Infantry Regiment, under the command of Foley. He helped hold off German forces attacking the line being held by the 101st Airborne, afterward, he was put into Jones's squad.
A month after the attempt on the line, his, Moody's and Ramirez's squads were sent out on a mission to find a missing patrol. He assaulted a farm house near where the patrol was last heard from, he and Private Koppel captured a German Officer. After the German Officer gave away the position to the German forces in the treeline, Denny melees him with the butt of his Garand. Afterward, he and his squad reinforced Ramirez's squad, pinned down by a bunker.
On January 13, 1945, Denny commanded a squad which would take part in the assault on the town of Foy. When the unit was given the whistle, they charged head on into a hail of machine gun and Flak fire. His squad was tragically obliterated by a Flak shell.