The CTLS was originally designed for service with the United States Marine Corps in the late 1930s, right before the outbreak of World War II. The USMC wanted to field a lightly armored amphibious ...

Marmon-Herrington CTLS In an effort to find an amphibious light tank, the United States Marine Corps turned to the truck and tractor manufacturer Marmon-Herrington and solicited a light tank design.