The US Marine Corps formed six tank battalions in World War II which saw combat in some of the most varied and extreme conditions of the Pacific theater. The Marine tank battalions fought on small coral atolls such as Tarawa, in the fetid jungles of the south west Pacific including Guadalcanal, in the lush central Pacific islands of the Marianas such as Saipan and Guam, and on the volcanic deserts of the Bonin islands such as Iwo Jima. The tank equipment of the Marine Corps was essentially the same as that used by the US Army: the M3 and M5A1 light tanks, and the M4 Sherman medium tanks. But the conditions and the opponent forced the Marine Corps to adapt both in terms of technical and tactical innovations. The numerous island landings forced the development of novel landing equipment, especially deep wading equipment to get the tanks safely ashore. Japanese defensive tactics in 1943-44 put a premium on American use of flamethrowers and the development of a variety of flamethrower tanks on the M3 light tank chassis. Deadly Japanese close-infantry tactics forced the development of novel methods of tank protection including the use of wooden armor to defeat the use of magnetic anti-tank devices. This book will examine the Marine use of tanks in World War II and the tactics and technology that made their experiences so unique in the annals of tank warfare.