This book documents the development and production of the M4A1 through its many variations, as well as its combat use around the globe. Produced by Lima Locomotive Works, Pressed Steel Car Company, and Pacific Car and Foundry, the M4A1 was the first of the famed Sherman tanks and preceded the welded-hull M4 into production. Powered by a nine-cylinder, air-cooled radial engine, the M4A1 fought in North Africa with both US and British forces, across northwestern Europe, and on Pacific Islands with both the Army and the Marines, serving well into the 1950s. The evolving design went through three major hull designs, multiple turret designs, and armament with either a 75 mm or 76 mm gun--all of which are detailed in this book. Extensive archival photographs are augmented by stunning color images of preserved tanks, taking the reader around and inside this famed warhorse. Part of the Legends of Warfare series.