LVT

The Landing Vehicle Tracked (LVT) was a class of amphibious warfare vehicle, a small amphibious landing craft, introduced by the USN, USMC and US army during World war two. Originally intended solely as cargo carriers for ship to shore operations, they rapidly evolved into assault troop and fire support vehicles as well. The types were all widely known as amphtrack, amtrak, amtrac etc., a portmaneau of amphibious tractor.