The Clicker is an instrument that served as a recognition system for the paratroopers of the 101st Airborne Division sent on the night of June 5to 6, 1944 on Sainte-Mère-Église during Operation Albany.
It was in 1943 after the parachute drop into Sicily that Commander Taylor, who led the US 101st Airborne Division, understood the importance of communication once forces had infiltrated enemy territory. Isolated and scattered, the paratroopers found it difficult to find and regroup without risking easy targets for Axis forces.
The U.S. troops hijacked a toy that was very popular at the time and the soldiers were given it a few days before the landing. A parallelepiped-shaped chrome-plated brass blade that emits a snap when pressed.