M113

M113 Armored personnel carrier
A U.S. Army M113 of 1st Battalion, 4th Infantry Regiment provides overwatch while conducting recon operations during exercise Allied Spirit at the Joint Multinational Readiness Center in Hohenfels, Germany
Type	Armored personnel carrier
Place of origin	United States
Service history
In service	1960–present
Used by	See Operators
Wars	Vietnam War Six Day War Indo-Pakistani War of 1965 Indo-Pakistani War of 1971 Yom Kippur War Lebanese Civil War 1982 Lebanon War South Lebanon conflict (1985–2000) Invasion of Panama Iran–Iraq War Persian Gulf War Kosovo War War in Afghanistan Iraq War Waziristan War Second Intifada 2006 Lebanon War Gaza War Libyan Civil War Operation Protective Edge Iraqi insurgency Syrian Civil War
Production history
No. built	≈80,000 (all variants)
Variants	Numerous, see text
Specifications
Weight	12.3 tonnes (13.6 short tons; 12.1 long tons)
Length	4.863 metres (15 ft 11.5 in)
Width	2.686 metres (8 ft 9.7 in)
Height	2.5 metres (8 ft 2 in)
Crew	2
Passengers	11 passengers
Armor	aluminum 12–38 millimetres (0.47–1.50 in)
Main armament	M2 Browning machine gun
Secondary armament	varies (see text)
Engine	Detroit Diesel 6V53T, 6-cylinder diesel engine 275 hp (205 kW)
Power/weight	22.36 hp/tonne
Suspension	torsion bar, 5 road wheels
Operational range	480 km (300 mi)
Speed	67.6 km/h (42.0 mph), 5.8 km/h (3.6 mph) swimming

The M113 is a fully tracked armored personnel carrier that was developed by Food Machinery Corp (FMC). The vehicle was first fielded by the United States Army's mechanized infantry units in Vietnam in April 1962. The M113 was the most widely used armored vehicle of the U.S. Army in the Vietnam War, earning the nickname 'Green Dragon' by the Viet Cong as it was used to break through heavy thickets in the midst of the jungle to attack and overrun enemy positions. It was largely known as an "APC" or an "ACAV" (armored cavalry assault vehicle) by the allied forces.

The M113 introduced new aluminum armor that made the vehicle much lighter than earlier vehicles; it was thick enough to protect the crew and passengers against small arms fire but light enough that the vehicle was air transportable and moderately amphibious. In the U.S. Army, the M113 series have long been replaced as front-line combat vehicles by the M2 and M3 Bradleys, but large numbers are still used in support roles such as armored ambulance, mortar carrier, engineer vehicle, and command vehicle. The army's heavy brigade combat teams are equipped with around 6,000 M113s and 4,000 Bradleys.

The M113's versatility spawned a wide variety of adaptations that live on worldwide, and in U.S. service. These variants together currently represent about half of U.S. Army armored vehicles. To date, it is estimated that over 80,000 M113s of all types have been produced and used by over 50 countries worldwide, making it one of the most widely used armored fighting vehicles of all time. The Military Channel's Top Ten series named the M113 the most significant infantry vehicle in history.

The U.S. Army planned to retire the M113 family of vehicles by 2018, seeking replacement with the GCV Infantry Fighting Vehicle program, but now replacement of the M113 has fallen to the Armored Multi-Purpose Vehicle (AMPV) program. Thousands of M113s continue to see combat service in the IDF, although as of 2014 the IDF was seeking to gradually replace many of its vehicles with Namer APCs.