M114 155 mm howitzer

The M114 155 mm howitzer was a towed howitzer developed and used by the United States Army. It was first produced in 1942 as a medium artillery piece under the designation of 155 mm Howitzer M1. It saw service with the US Army during World War II, the Korean War, and the Vietnam War, before being replaced by the M198 howitzer.

The gun was also used by the armed forces of many nations, including Afghanistan, Argentina, Austria, Belgium, Brazil, Bosnia, Cambodia, Cameroon, Canada, Chile, Republic of China, Croatia, Denmark, Germany, Ecuador, France, Greece, Iran, Iraq, Israel, Italy, Japan, Jordan, South Vietnam, South Korea, Lebanon, Libya, Norway, Netherlands, Pakistan, the Philippines, Portugal, Saudi Arabia, Singapore, Spain, Thailand, Turkey, Venezuela, Vietnam and Yugoslavia.

In some countries, the M114 still remains in service.

M114 155 mm howitzer
Class Vehicle
Type Towed Artillery
Manufacturer Rock Island Arsenal
Production Period 1941 - 1953
Origin United States of America
Country Name Origin Year
United States of America 1942
Country Name Operational Year Retirement Year
Afghanistan View
Argentina View
Austria View
Belgium View
Bosnia-Herzegovina View
Brazil View
Cambodia (Kampuchea) View
Cameroon View
Canada View
Chile View
China View
Croatia View
Denmark View
Ecuador View
France View
Greece View
Indonesia View
Iran (Persia) View
Israel View
Italy View
Japan View
Jordan View
Korea View
Lebanon View
Libya View
Malaysia View
Morocco View
Netherlands View
Pakistan View
Peru View
Philippines View
Portugal View
Saudi Arabia View
Singapore View
Spain View
Thailand (Siam) View
Tunisia View
Turkey (Ottoman Empire) View
United States of America 1942 View
Uruguay View
Venezuela View
Vietnam View
Vietnam View
Yugoslavia (Serbia) View
Norway View
ManufacturerName Production From Production To Quantity
Rock Island Arsenal 1941 1953 10300 View

A new carriage was under development for much of the 1930s for the existing World War I-era M-1918 155 mm howitzer, which was a license-built French Canon de 155 C modèle 1917 Schneider until 1939 when it was realized that it did not seem logical to put a new carriage underneath an obsolete howitzer. So development began anew with a carriage designed to be used for either the 155 mm howitzer or the 4.7-inch (120 mm) gun. This was completed by 15 May 1941 when the Howitzer M1 on the Carriage M1 was standardized. The howitzer itself differed from the older model by a lengthened barrel of 20 calibers and a new breech mechanism. Uniquely it was the sole 'slow-cone' interrupted screw mechanism to enter service after 1920. This meant that two separate movements were necessary to open the breech, versus the single movement of the 'steep cone' mechanism that simultaneously rotated and withdrew the breech.

The M1A1 was redesignated as the M114A1 in 1962.

Type Howitzer
Place of origin  United States
Service history
In service 1942–present
Used by See operators
Wars World War II, Korean War,Vietnam War, Lebanese Civil War
Production history
Designed 1939–1941
Manufacturer Rock Island Arsenal (US)
Produced 1941–1953
Number built 10,300+
Variants none
Weight Travel: 5,800 kg (12,800 lb)
Combat: 5,600 kg (12,300 lb)
Length Travel: 7.315 m (20 ft)
Barrel length Bore: 3.564 m (11 ft 8 in) L/23
Overall: 3.79 m (12 ft 5 in) L/24.5
Width Travel: 2.438 m (8 ft)
Height Travel: 1.8 m (5 ft 11 in)
Crew 11
Shell separate-loading bagged charge
Caliber 155 mm (6.1 in)
Breech slow-cone interrupted screw
Recoil hydropneumatic system
Carriage split trail
Elevation -2°/+63°
Traverse 25° left or right
Rate of fire burst: 4 rpm
sustained: 40 rph
Muzzle velocity 563 m/s (1,847 ft/s)
Maximum firing range 14,600 m (16,000 yd)

End notes