|M1 Combat Car|
|Place of origin||United States|
|Used by||United States|
|Manufacturer||Rock Island Arsenal|
|Weight||8,523 kg (18,790 lb)|
|Length||4.14 m (13.6 ft)|
|Width||2.4 m (7 ft 10 in)|
|Height||2.26 m (7 ft 5 in)|
|12.7mm machine gun|
|7.62mm machine gun|
|Engine|| Continental automobile W-670 7-cylinder gasoline|
250 hp (190 kW)
|Suspension||Vertical volute spring|
|161 km (100 mi)|
|Speed||72 km/h (45 mph)|
Under the terms of the Defense Act of 1920, tanks were restricted to infantry units. To allow U.S. Army cavalry units to be equipped with armoured fighting vehicles, the tanks developed for the cavalry were designated "combat cars". The M1 series entered service in 1937. In 1940, the Combat Car designation was dropped, and the vehicle were renamed as light tank M1A2.
- M1 - the original variant. 89 built.
- M1A1 - new octagonal turret instead of a D-shaped one; increased distance between the wheel bogies. 17 built.
- M1A1E1 - engine replaced by Guiberson T-1020 diesel. 7 built.
- List of U.S. military vehicles by supply catalog designation
- List of U.S. military vehicles by model number
- M2 Light Tank
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