The M41 Walker Bulldog was a U.S. light tank developed to replace the M24 Chaffee. It was named for General Walton Walker who died in a jeep accident in Korea. On 7 November 1950, the US Ordnance Committee Minutes (OCM) issued item #33476, redesignating the heavy, medium, and light tank classifications to classifications according to armament; the 120mm (heavy) Gun Tanks, 90mm (medium) Gun Tanks, and the 76mm (light) Gun tanks

http://en.wikipedia.org/wiki/M41_Walker_Bulldog