American Combat Cars
In 1920 the U.S. Military decided to concentrate their efforts on the development of light tanks, this was down to money as light tanks are cheaper to make, but also a weight limit was set to keep to vehicles under 15 tons, and this was down to a bridge loading limit. In 1920 an act was proposed to limit the control of American tanks to the Infantry. This was not adhered by the Cavalry who wanted a tank arm of their own, so they began to develop a number of vehicles under the guise of Combat Cars, these were really light tanks, and were built along the same lines as the tanks developed by the Infantry. Following this the M1 Combat Car was standardised in 1937, and later by the M2, and it was from these vehicles that led to the basis of all Light Tank designs up to 1944.