A battalion is a military unit, typically consisting of 300 to 1,000 soldiers commanded by a lieutenant colonel, and subdivided into a number of companies. The typical battalion is built from three operational companies, one weapons company and one HQ company. In some countries, battalions are exclusively infantry, while in others battalions are unit-level organisations.
A regiment is a military unit. Its role and size varies markedly, depending on the country, service and/or a specialisation.
The Indian Army is the land-based branch and largest component of the Indian Armed Forces. The President of India is the Supreme Commander of the Indian Army, and its professional head is the Chief of Army Staff (COAS). The Indian Army was established on 1 April 1895 alongside the long established presidency armies of the East India Company, which too were absorbed into it in 1903. Some princely states maintained their own armies which formed the Imperial Service Troops which, along with the Indian Army formed the land component of the Armed Forces of the Crown of India, responsible for the defence of the Indian Empire. The Imperial Service Troops were merged into the Indian Army after independence. The units and regiments of the Indian Army have diverse histories and have participated in several battles and campaigns around the world, earning many battle and theatre honours before and after Independence.
The Royal Regiment of Australian Artillery, normally referred to as the Royal Australian Artillery (RAA), is a Regiment of the Australian Army descended from the original colonial artillery units prior to Australia's federation. Australia's first guns were landed from HMS Sirius and a small earthen redoubt built, near the present-day Macquarie Place, to command the approaches to Sydney Cove. The deployment of these guns represents the origins of artillery in Australia. These and subsequent defences, as well as field guns, were operated by marines and the soldiers of infantry regiments stationed in Australia. Unlike their British and Canadian equivalents, there are no regiments of horse artillery in the order of battle of the Royal Australian Artillery. The First World War saw the raising of 60 field, 20 howitzer, and two siege batteries along with the heavy and medium trench mortar batteries. Until 19 September 1962 the Australian Artillery was referred to as the 'Royal Australian Artillery', however, on this date Queen Elizabeth II granted the RAA the title of 'The Royal Regiment of Australian Artillery'. The Regiment today consists of Regular and Reserve units.
The Egyptian Air Defence Forces or EADF, is the Anti-aircraft warfare branch of the Egyptian Armed Forces. It is responsible for protecting the Egyptian airspace against any hostile air attacks. The EADF was established in accordance with the presidential decree issued on 1 February 1968, which established the Air Defence Forces as the fourth branch, next to the Navy, Egyptian Ground Forces, and Egyptian Air Force. From 1938 onwards air defence forces had been part of the artillery and under the operation command of the Air Force. Egypt has a modern system of air defence armament, which is divided between anti-aircraft missiles long, medium and short-range anti-aircraft artillery systems and early warning radars. Both Western and Soviet bloc countries have supplied equipment.
The Rejimen Artileri DiRaja is the artillery corps of the Malaysian Army. Rejimen Artileri DiRaja was formed in Kajang on 15 August 1957 when a single battery was formed, drawn from Malay personnel formerly serving with the British Army's Royal Regiment of Artillery. Today Rejimen Artileri DiRaja is a modern fighting arm providing direct fire support to Malaysian Army units using field artillery pieces and MLRS.
The Bulgarian Land Forces are the ground warfare branch of the Bulgarian Armed Forces. It is administered by the Ministry of Defence, previously known as the Ministry of War during the Kingdom of Bulgaria. The Land Forces were established in 1878, when they were composed of anti-Ottoman militia (opalchentsi) and were the only branch of the Bulgarian military.
The Regiment of Artillery is a combat/fighting arm of the Indian Army, which provides massive firepower during all ground operations of the Indian Army. It is a successor to the Royal Indian Artillery (RIA) of British Indian Army, which itself traces its origins to the formation of Bombay Artillery in 1827.
52nd (London) Heavy Anti-Aircraft Regiment was a volunteer air defence unit of Britain's Territorial Army from 1922 until 1961. In World War II it defended London during The Blitz and later served in the Burma Campaign.
53rd Heavy Anti-Aircraft Regiment, Royal Artillery was a volunteer air defence unit of Britain's Territorial Army from 1922 until 1961. During World War II it fought in the Battle of France and The Blitz, and later served in India, where it was converted to Medium Artillery. Postwar it reverted to the AA artillery role.
The 79th Heavy Anti-Aircraft Regiment, Royal Artillery was an air defence unit of Britain's Territorial Army (TA). Formed just before World War II, it fought in the Battle of France, the Swansea Blitz, Operation Torch and the Italian Campaign. It continued serving in the post-war TA until 1955.
56th (Cornwall) Heavy Anti-Aircraft Regiment, Royal Artillery was a volunteer air defence regiment of Britain's Territorial Army (TA). Originally raised in 1920 as a medium artillery regiment, it was converted to the anti-aircraft role in 1932. During the Second World War, it was employed in Home Defence, in Iceland and then in India, where it was temporarily converted back to medium artillery. Postwar, it reverted to air defence until disbandment in 1955.
The South African Army Air Defence Artillery Formation is the controlling entity of all South African Army Air Defence Artillery units. This Formation consists of both regular and reserve units.
The iWombe Anti-Aircraft Regiment is a reserve air defence regiment of the South African Army.
The 56th Anti-Tank Regiment was a Territorial Army unit of the British Army's Royal Artillery (RA), which converted from the 4th Battalion, King's Own Royal Regiment (Lancaster). During the Second World War, it first served with the 42nd Division in the Battle of France and Dunkirk evacuation in May–June 1940. In 1942, it was sent to join the 70th Infantry Division in India, where it was converted into a Light Anti-Aircraft/Anti-Tank Regiment. In this guise, it served in the Burma Campaign, mainly with the 5th Indian Infantry Division. It reconverted to the anti-tank role in late 1944 and in June 1945 it returned to India as a training unit. It continued serving in the TA postwar until 1961, when it re-merged into the King's Own.
The Army Air Defence College,, is the training academy for the Army Air Defence Corps of Indian Army. The college is located in the Gopalpur Military Station in Gopalpur, Odisha. It spreads over an area of 2700 acres of land. The primary objective of the academy is to impart technical and operational knowledge to the personnel of Indian Army posted to the Corps of Army Air Defence (AAD) about the air defence systems and anti-aircraft warfare. Besides the army personnel, the academy also trains personnel from navy, air force and officers from friendly foreign nations.
The following is a hierarchical outline of the Czechoslovak People's Army at the end of the Cold War. It is intended to convey the connections and relationships between units and formations. At the end of the Cold War in 1989 the Czechoslovak People's Army structure was as follows.
132nd (Mixed) Heavy Anti-Aircraft Regiment was an air defence unit of Britain's Royal Artillery formed during World War II. It was one of the first 'Mixed' regiments in which women of the Auxiliary Territorial Service were integrated into the unit's personnel. It defended London and South-East England against aerial attack until it deployed to Belgium in January 1945 to defend Brussels against V-1 flying bombs.
The 4th Anti-aircraft Artillery Regiment "Peschiera" is an air defence regiment of the Italian Army. Originally an air defence regiment of the Royal Italian Army, the regiment is now based in Mantua in Lombardy and assigned to the Anti-aircraft Artillery Command. During the Cold War the regiment was equipped with MIM-23 Hawk air defence missile systems and formed, together with the 5th Anti-aircraft Missile Artillery Regiment, the air defence belt of the Italian Army in the country's Northeast.
136th Heavy Anti-Aircraft Regiment was an air defence unit of Britain's Royal Artillery during World War II. It protected the UK against air attack as part of Anti-Aircraft Command, including the defence against V-1 flying bombs. It was disbanded at the end of the war.
British India (1939-1947)
India (1947-present)
United Kingdom 
British Indian Army 
Indian Army 
