The OTO-Melara Mod 56 is an Italian-made

105 mm 105 mm (4.1 in) is a common NATO-standard artillery and tank gun calibre. The rifled tank round is defined by STANAG 4458. The artillery round is defined by AOP-29 part 3 with reference to STANAG 4425. Artillery Since the early 21st century, mos ...

pack howitzer built and developed by

OTO Melara OTO Melara was a subsidiary of the Italian company Finmeccanica, today Leonardo, active in the defence sector, with factories in Brescia and La Spezia. From 1 January 2016, the activities of OTO Melara merged into Leonardo's Defence Systems ...

. It fires the standard US type M1 ammunition.

History

The OTO Melara 105 mm Mod 56 began life in the 1950s to meet the requirement for a modern light-weight

howitzer The howitzer () is an artillery weapon that falls between a cannon (or field gun) and a mortar. It is capable of both low angle fire like a field gun and high angle fire like a mortar, given the distinction between low and high angle fire break ...

that could be used by the

Italian Army The Italian Army ( []) is the Army, land force branch of the Italian Armed Forces. The army's history dates back to the Italian unification in the 1850s and 1860s. The army fought in colonial engagements in China and Italo-Turkish War, Libya. It ...

's ''

Alpini The Alpini are the Italian Army's specialist mountain infantry. Part of the army's infantry corps, the speciality distinguished itself in combat during World War I and World War II. Currently the active Alpini units are organized in two operati ...

'' brigades mountain artillery regiments. That it remained in service with those units a full half century after its introduction is a testament to the gun's quality. The Mod 56 has a number of unique characteristics for a weapon of its caliber, including the ability for its crew to manhandle the gun (due to its light weight), and the capability of being used in the direct fire role. Being a pack howitzer, it is designed to be broken down into 12 parts, each of which can be transported easily. Its ability to be "knocked-down" allows the sections to be transported a number of ways, although the original design was for mule-pack using special pack saddles. More often it is towed by a light vehicle such as a jeep or Land Rover. With the shield removed it can be carried inside an

M113 armored personnel carrier The M113 is a fully tracked armored personnel carrier (APC) that was developed and produced by the FMC Corporation. The M113 was sent to United States Army Europe in 1961 to replace the mechanized infantry's M59 armored personnel carrier, M59 A ...

. Its particular attraction to Western armies in the 1960s was that its light weight meant it could be lifted in one piece by helicopter, which made the gun popular with light artillery units in many countries as well as the more specialized

mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher t ...

and airborne troops. Overall, the Mod 56 has served in more than 30 countries worldwide, of which a partial listing of the major operators is below. As an added refinement to the gun's mass, the Mod 56 is built to be an artillery piece with a reputation of ease with which it can be assembled and then disassembled into twelve components within minutes. The gun's light weight did have the drawback that it lacked the robustness necessary for sustained operations. Australian and New Zealand gunners in

South Vietnam South Vietnam, officially the Republic of Vietnam (RVN; , VNCH), was a country in Southeast Asia that existed from 1955 to 1975. It first garnered Diplomatic recognition, international recognition in 1949 as the State of Vietnam within the ...

found the weapon unsuitable for continuous operations. The guns were replaced by the sturdy US-made M101A1 after some two years. The lack of durability also led to their being carried on trucks for longer distances outside the combat zone. The Mod 56 offered limited protection to its crew. The Chinese manufacturer NORINCO offers a version of the Model 56 pack howitzer and its associated ammunition. In

Commonwealth A commonwealth is a traditional English term for a political community founded for the common good. The noun "commonwealth", meaning "public welfare, general good or advantage", dates from the 15th century. Originally a phrase (the common-wealth ...

service, the gun was known simply as the "L5 pack howitzer" with L10 ordnance. However, its lack of range and the indifferent lethality of its ammunition led the UK to start development of its replacement, the

L118 light gun The L118 light gun is a 105 mm towed howitzer. It was originally designed and produced in the United Kingdom for the British Army in the 1970s. It has since been widely exported. The L119 and the United States Army's M119 are variants that use a ...

, which provided British Gunners a significant advantage in range when facing the Argentine OTO Melaras during the Falklands war. The gun became the standard equipment of the Allied Command Europe Mobile Force (AMF ACE Mobile Force (Land)) artillery, equipping the batteries provided by Canada, Belgium, Germany, Italy and the UK until 1975.

Combat service

Identified combat use includes: *

Argentine Army The Argentine Army () is the Army, land force branch of the Armed Forces of the Argentine Republic and the senior military service of Argentina. Under the Argentine Constitution, the president of Argentina is the commander-in-chief of the Armed For ...

3rd and 4th Artillery Groups during the 1982

Falklands War The Falklands War () was a ten-week undeclared war between Argentina and the United Kingdom in 1982 over two British Overseas Territories, British dependent territories in the South Atlantic: the Falkland Islands and Falkland Islands Dependenci ...

British Army The British Army is the principal Army, land warfare force of the United Kingdom. the British Army comprises 73,847 regular full-time personnel, 4,127 Brigade of Gurkhas, Gurkhas, 25,742 Army Reserve (United Kingdom), volunteer reserve perso ...

during the

Aden Emergency The Aden Emergency, also known as the 14 October Revolution () or as the Radfan Uprising, was an armed rebellion by the National Liberation Front (South Yemen), National Liberation Front (NLF) and the Front for the Liberation of Occupied South ...

South Yemen South Yemen, officially the People's Democratic Republic of Yemen, abbreviated to Democratic Yemen, was a country in South Arabia that existed in what is now southeast Yemen from 1967 until Yemeni unification, its unification with the Yemen A ...

(1st Light Regiment Royal Horse Artillery and 19 Light Regiment RA) and

Borneo Borneo () is the List of islands by area, third-largest island in the world, with an area of , and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime Southeast Asia, it is one of the Greater Sunda ...

(4, 6, 29 Cdo, 40, 45 and 95 Cdo Light Regiments RA) *

Australian Army The Australian Army is the principal Army, land warfare force of Australia. It is a part of the Australian Defence Force (ADF), along with the Royal Australian Navy and the Royal Australian Air Force. The Army is commanded by the Chief of Army ...

during the

Malayan Emergency The Malayan Emergency, also known as the Anti–British National Liberation War, was a guerrilla warfare, guerrilla war fought in Federation of Malaya, Malaya between communist pro-independence fighters of the Malayan National Liberation Arm ...

in Borneo and Malaya (102 Field Battery) and during the

Vietnam War The Vietnam War (1 November 1955 – 30 April 1975) was an armed conflict in Vietnam, Laos, and Cambodia fought between North Vietnam (Democratic Republic of Vietnam) and South Vietnam (Republic of Vietnam) and their allies. North Vietnam w ...

in 1965–1967 (and very limited use thereafter) by 101, 103, 105, 106, and 108 Field Batteries *

Malaysian Army The Malaysian Army (; Jawi alphabet, Jawi: ) is the land component of the Malaysian Armed Forces. Steeped in British Army traditions, the Malaysian Army does not carry the title ‘royal’ () as do the Royal Malaysian Navy and the Royal Malaysi ...

in Borneo and Malaysian Peninsular during the

Second Malayan Emergency The second (symbol: s) is a unit of time derived from the division of the day first into 24 hours, then to 60 minutes, and finally to 60 seconds each (24 × 60 × 60 = 86400). The current and formal definition in the International System of Un ...

(1968–1989) also use during

2013 Lahad Datu standoff The 2013 Lahad Datu standoff, also known as the Lahad Datu incursion or Operation Daulat (), was a military conflict in Lahad Datu District, Lahad Datu, Malaysia. The conflict began on 11 February, when 235 militants arrived in Lahad Datu by bo ...

Nigerian Army The Nigerian Army (NA) is the land force of the Nigerian Armed Forces. It is the largest component of the Nigerian Armed Forces. The President of Nigeria is the Commander-in-Chief of the Nigerian Army, and its professional head is the Chie ...

during

Nigerian Civil War The Nigerian Civil War (6 July 1967 – 15 January 1970), also known as the Biafran War, Nigeria-Biafra War, or Biafra War, was fought between Nigeria and the Republic of Biafra, a Secession, secessionist state which had declared its independen ...

. Some were captured by

Biafra Biafara Anglicisation (linguistics), anglicized as Biafra ( ), officially the Republic of Biafra, was a List of historical unrecognized states and dependencies, partially recognised state in West Africa that declared independence from Nigeria ...

ns. *

New Zealand Army The New Zealand Army (, ) is the principal Army, land warfare force of New Zealand, a component of the New Zealand Defence Force alongside the Royal New Zealand Navy and the Royal New Zealand Air Force. Formed in 1845, as the New Zealand Mil ...

deployed rotations of 4 guns during the Vietnam War (161 Battery of the 16th Field Regiment). *

Ukrainian Army The Ukrainian Ground Forces (SVZSU, ), also referred to as the Ukrainian army, is a land force, and one of the eight Military branch, branches of the Armed Forces of Ukraine. It was formed from Ukrainian units of the Soviet Army after Declaratio ...

during the

Russo-Ukrainian War The Russo-Ukrainian War began in February 2014 and is ongoing. Following Ukraine's Revolution of Dignity, Russia Russian occupation of Crimea, occupied and Annexation of Crimea by the Russian Federation, annexed Crimea from Ukraine. It then ...

(2022–present) in Bakhmut, Ukraine in March 2023

Operators

Current operators (2024)

Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...

- 64 (Army) and 13 (Naval Infantry) *

Bangladesh Bangladesh, officially the People's Republic of Bangladesh, is a country in South Asia. It is the List of countries and dependencies by population, eighth-most populous country in the world and among the List of countries and dependencies by ...

- 170 *

Botswana Botswana, officially the Republic of Botswana, is a landlocked country in Southern Africa. Botswana is topographically flat, with approximately 70 percent of its territory part of the Kalahari Desert. It is bordered by South Africa to the sou ...

- 6 *

Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...

- 60 *

Chile Chile, officially the Republic of Chile, is a country in western South America. It is the southernmost country in the world and the closest to Antarctica, stretching along a narrow strip of land between the Andes, Andes Mountains and the Paci ...

- 104 *

Ecuador Ecuador, officially the Republic of Ecuador, is a country in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean on the west. It also includes the Galápagos Province which contain ...

- 24 *

Kenya Kenya, officially the Republic of Kenya, is a country located in East Africa. With an estimated population of more than 52.4 million as of mid-2024, Kenya is the 27th-most-populous country in the world and the 7th most populous in Africa. ...

- 7 *

Malaysia Malaysia is a country in Southeast Asia. Featuring the Tanjung Piai, southernmost point of continental Eurasia, it is a federation, federal constitutional monarchy consisting of States and federal territories of Malaysia, 13 states and thre ...

- 100 *

Peru Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pac ...

- 24 *

Philippines The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...

- 100 (Army) 20 (Marine Corps) *

San Marino San Marino, officially the Republic of San Marino, is a landlocked country in Southern Europe, completely surrounded by Italy. Located on the northeastern slopes of the Apennine Mountains, it is the larger of two European microstates, microsta ...

- 2 *

Spain Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...

- 148 (Army) and 24 (Naval Infantry) *

Ukraine Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the nor ...

- 6 donated to Ukraine by Spain. At least one was lost in combat. *

Venezuela Venezuela, officially the Bolivarian Republic of Venezuela, is a country on the northern coast of South America, consisting of a continental landmass and many Federal Dependencies of Venezuela, islands and islets in the Caribbean Sea. It com ...

- 40 *

Zambia Zambia, officially the Republic of Zambia, is a landlocked country at the crossroads of Central Africa, Central, Southern Africa, Southern and East Africa. It is typically referred to being in South-Central Africa or Southern Africa. It is bor ...

- 18

Former operators

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...

Belgium Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeas ...

- 2 in 2003 *

- captured from Nigeria *

Burkina Faso Burkina Faso is a landlocked country in West Africa, bordered by Mali to the northwest, Niger to the northeast, Benin to the southeast, Togo and Ghana to the south, and Ivory Coast to the southwest. It covers an area of 274,223 km2 (105,87 ...

- 2 in 2003 *

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

- 22 in 2003 *

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

- 2 in 2003 *

Cyprus Cyprus (), officially the Republic of Cyprus, is an island country in the eastern Mediterranean Sea. Situated in West Asia, its cultural identity and geopolitical orientation are overwhelmingly Southeast European. Cyprus is the List of isl ...

- 54 in 2003 *

Djibouti Djibouti, officially the Republic of Djibouti, is a country in the Horn of Africa, bordered by Somalia to the south, Ethiopia to the southwest, Eritrea in the north, and the Red Sea and the Gulf of Aden to the east. The country has an area ...

- 1 in 2003 *

Ethiopia Ethiopia, officially the Federal Democratic Republic of Ethiopia, is a landlocked country located in the Horn of Africa region of East Africa. It shares borders with Eritrea to the north, Djibouti to the northeast, Somalia to the east, Ken ...

- 2 in 2003 *

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

- 28 in 2003 *

Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...

- 19 in 2003 *

Ghana Ghana, officially the Republic of Ghana, is a country in West Africa. It is situated along the Gulf of Guinea and the Atlantic Ocean to the south, and shares borders with Côte d’Ivoire to the west, Burkina Faso to the north, and Togo to t ...

Greece Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th ...

- 18 *

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

- 50 *

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania, between the Indian Ocean, Indian and Pacific Ocean, Pacific oceans. Comprising over List of islands of Indonesia, 17,000 islands, including Sumatra, ...

- 10 in 2003 *

Iraq Iraq, officially the Republic of Iraq, is a country in West Asia. It is bordered by Saudi Arabia to Iraq–Saudi Arabia border, the south, Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq border, the east, the Persian Gulf and ...

- 118 in 2003 *

Iran Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the nort ...

- 12 in 2003 *

Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...

- 18 *

Kuwait Kuwait, officially the State of Kuwait, is a country in West Asia and the geopolitical region known as the Middle East. It is situated in the northern edge of the Arabian Peninsula at the head of the Persian Gulf, bordering Iraq to Iraq–Kuwait ...

- 6 in 2003 *

Morocco Morocco, officially the Kingdom of Morocco, is a country in the Maghreb region of North Africa. It has coastlines on the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to Algeria–Morocc ...

- 16 in 2003 *

Nepal Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked country in South Asia. It is mainly situated in the Himalayas, but also includes parts of the Indo-Gangetic Plain. It borders the Tibet Autonomous Region of China Ch ...

- 14 *

New Zealand New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of isla ...

- 8 in 2003 *

Nigeria Nigeria, officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf of Guinea in the Atlantic Ocean to the south. It covers an area of . With Demographics of Nigeria, ...

- 50 :*

Boko Haram Boko Haram, officially known as Jama'at Ahl al-Sunna li al-Da'wa wa al-Jihad (), is a self-proclaimed jihadist militant group based in northeastern Nigeria and also active in Chad, Niger, northern Cameroon, and Mali. In 2016, the group spli ...

: At least 1 captured from Nigeria *

Pakistan Pakistan, officially the Islamic Republic of Pakistan, is a country in South Asia. It is the List of countries and dependencies by population, fifth-most populous country, with a population of over 241.5 million, having the Islam by country# ...

- 213 *

Portugal Portugal, officially the Portuguese Republic, is a country on the Iberian Peninsula in Southwestern Europe. Featuring Cabo da Roca, the westernmost point in continental Europe, Portugal borders Spain to its north and east, with which it share ...

- 24 in 2003 *

Saudi Arabia Saudi Arabia, officially the Kingdom of Saudi Arabia (KSA), is a country in West Asia. Located in the centre of the Middle East, it covers the bulk of the Arabian Peninsula and has a land area of about , making it the List of Asian countries ...

- 24 in 2003 *

Somalia Somalia, officially the Federal Republic of Somalia, is the easternmost country in continental Africa. The country is located in the Horn of Africa and is bordered by Ethiopia to the west, Djibouti to the northwest, Kenya to the southwest, th ...

- 89 in 2003 *

Sudan Sudan, officially the Republic of the Sudan, is a country in Northeast Africa. It borders the Central African Republic to the southwest, Chad to the west, Libya to the northwest, Egypt to the north, the Red Sea to the east, Eritrea and Ethiopi ...

Thailand Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...

- 12 *

United Arab Emirates The United Arab Emirates (UAE), or simply the Emirates, is a country in West Asia, in the Middle East, at the eastern end of the Arabian Peninsula. It is a Federal monarchy, federal elective monarchy made up of Emirates of the United Arab E ...

- 18 in 2003 *

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...

- 52 in 2003 *

Yemen Yemen, officially the Republic of Yemen, is a country in West Asia. Located in South Arabia, southern Arabia, it borders Saudi Arabia to Saudi Arabia–Yemen border, the north, Oman to Oman–Yemen border, the northeast, the south-eastern part ...

- 4 in 2003 *

Yugoslavia , common_name = Yugoslavia , life_span = 1918–19921941–1945: World War II in Yugoslavia#Axis invasion and dismemberment of Yugoslavia, Axis occupation , p1 = Kingdom of SerbiaSerbia , flag_p ...

. After its dissolution the guns come under control of the new states, as follows: **

Bosnia and Herzegovina Bosnia and Herzegovina, sometimes known as Bosnia-Herzegovina and informally as Bosnia, is a country in Southeast Europe. Situated on the Balkans, Balkan Peninsula, it borders Serbia to the east, Montenegro to the southeast, and Croatia to th ...

- 3 in 2003 **

Croatia Croatia, officially the Republic of Croatia, is a country in Central Europe, Central and Southeast Europe, on the coast of the Adriatic Sea. It borders Slovenia to the northwest, Hungary to the northeast, Serbia to the east, Bosnia and Herze ...

- 2 in 2003 **

Macedonia Macedonia (, , , ), most commonly refers to: * North Macedonia, a country in southeastern Europe, known until 2019 as the Republic of Macedonia * Macedonia (ancient kingdom), a kingdom in Greek antiquity * Macedonia (Greece), a former administr ...

- 2 in 2003 ** Serbia and Montenegro Federation - 17 in 2003 *

Zimbabwe file:Zimbabwe, relief map.jpg, upright=1.22, Zimbabwe, relief map Zimbabwe, officially the Republic of Zimbabwe, is a landlocked country in Southeast Africa, between the Zambezi and Limpopo Rivers, bordered by South Africa to the south, Bots ...

- 9 in 2003

References

;Notes

History

Combat service

Operators

Current operators (2024)

Former operators

References

Further reading