On that day, near Bastogne, Belgium, he destroyed a German machine gun position before beginning a one-man assault on a Tiger Royal tank.

Staff Sergeant Gammon's official Medal of Honor citation reads: He charged 30 yards through hip-deep snow to knock out a machinegun and its 3-man crew with grenades, saving his platoon from being decimated and allowing it to continue its advance from an open field into some nearby woods.

Gammon, disregarding all thoughts of personal safety, rushed forward, then cut to the left, crossing the width of the platoon's skirmish line in an attempt to get within grenade range of the tank and its protecting foot troops.

He charged the automatic weapon, wiped out its crew of 4 with grenades, and, with supreme daring, advanced to within 25 yards of the armored vehicle, killing 2 hostile infantrymen with rifle fire as he moved forward.

Gammon cleared the woods of German forces, for the tank continued to withdraw, leaving open the path for the gallant squad leader's platoon.