The M4 Sherman was the primary tank used by the U.S. Army and Marine Corps during WWII. Following the Japanese attack on Pearl Harbor, a technically simple and reliable medium tank, labeled “M4” was put into production post-haste. It was by no means the finest, most powerful, or well-armored tank serving in the worldwide conflict; however, it was accepted as the standard combat tank of the U.S. military.
It was mass-produced and for this reason it was often said “The M4 Sherman tank was a winner by quantity, not by quality.” The M4 Sherman served in the U.S. military from 1942 until 1955.
(Text courtesy of Ships of Discovery/Coastal Resources Management/CNMI Division of Historic Preservation/Flinders University Dive Guide)