The M2 Medium was never used in combat. For the M2 Light Tank,
"By December 1941, the M2A1, M2A2 and M2A3 were used for training only. A few M2A4 saw some combat in the
Battle of Guadalcanal with the
U.S. Marine Corps and remained in service in some areas of Pacific until 1943.
Britain ordered 100 M2A4s in early 1941. After 36 of them were delivered, the order was canceled in favor of an improved
Light Tank M3."
M2 Light Tank - Wikipedia, the free encyclopedia