The M-60A3 Main Battle Tank was used extensively by the U.S. Marine Corps and the U.S. Army in the Viet Nam and Gulf Wars. It served as the primary U.S. main battle tank for two decades after being developed from the M48 Patton series, fitted with a 105 millimeter main gun, and manned by a four-man crew. Initially produced in 1960, more than 15,000 M60 tanks were built by Chrysler and first saw service in 1961; production ended in 1983, and 5,400 older models were later converted to the M60A3 variant through 1990. Though criticized for its high profile and limited cross-country mobility, it proved durable and reliable and underwent many updates during its service life. The tank also saw action with Israeli forces during the Yom Kippur War in the Sinai and the Golan Heights, and during Operation Desert Shield and Desert Storm the 1st Marine Expeditionary Force fielded 210 M60A3s to support the Saudi-Marine effort into Kuwait City. Combat-loaded weight was given as 55 tons, with other listed specifications including a 105 millimeter main gun, one .50 caliber machine gun, one 7.62 millimeter coaxial machine gun, a V-12 air-cooled 750 horsepower engine, an allowable speed of 30 to 35 miles per hour, and a cruising range of 280 miles.