A WWII-era U.S. medium tank. The vehicle was named after the Confederate General of the U.S. Civil War, R. Lee. Also, widely recognized under its U.K. designation, M3 Grant, named after the General of the federal troops U. Grant. M3 was created in 1940 on the basis of the M2 tank, and saw mass production from June 1941 through December 1942. A total of 6,258 M3 tanks of various modifications were produced.