T7 Combat Car was a prototype United States light tank design of the interwar period. It could run on rubber-tired wheels on roads or mount tracks for cross-country use. The only prototype T7 Combat Car (No. W40223) was shipped to Aberdeen Proving Grounds in August 1938 for testing. In October 1939, despite its potential, the Mechanized Cavalry Board recommended further development and test of the T7 Combat Car program, and all other such convertible vehicles, be canceled.