The Army Reserve is the active-duty volunteer reserve force of the British Army. It is separate from the Regular Reserve whose members are ex-Regular personnel who retain a statutory liability for service. The Army Reserve was known as the Territorial Force from 1908 to 1921, the Territorial Army (TA) from 1921 to 1967, the Territorial and Army Volunteer Reserve (TAVR) from 1967 to 1979, and again the Territorial Army (TA) from 1979 to 2014.
The King's African Rifles (KAR) was a British Colonial Auxiliary Forces regiment raised from Britain's East African colonies in 1902. It primarily carried out internal security duties within these colonies along with military service elsewhere during the world wars and other conflicts, such as the Malayan Emergency and the Mau Mau uprising. The regiment's enlisted soldiers were drawn from the native Africans, while most officers were seconded from the British Army. During the 1960s, as part of the decolonisation of Africa, more African officers were commissioned into the regiment before it was gradually disbanded. KAR battalions would go on to form the core of newly established armed forces throughout East Africa.
The Territorial Force was a part-time volunteer component of the British Army, created in 1908 to augment British land forces without resorting to conscription. The new organisation consolidated the 19th-century Volunteer Force and yeomanry into a unified auxiliary, commanded by the War Office and administered by local county territorial associations. The Territorial Force was designed to reinforce the regular army in expeditionary operations abroad, but because of political opposition it was assigned to home defence. Members were liable for service anywhere in the UK and could not be compelled to serve overseas. In the first two months of the First World War, territorials volunteered for foreign service in significant numbers, allowing territorial units to be deployed abroad. They saw their first action on the Western Front during the initial German offensive of 1914, and the force filled the gap between the near destruction of the regular army that year and the arrival of the New Army in 1915. Territorial units were deployed to Gallipoli in 1915 and, following the failure of that campaign, provided the bulk of the British contribution to allied forces in the Sinai and Palestine Campaign. By the war's end, the Territorial Force had fielded twenty-three infantry divisions and two mounted divisions on foreign soil. It was demobilised after the war and reconstituted in 1921 as the Territorial Army.
The Indian Army during World War II, a British force also referred to as the British Indian Army, began the war, in 1939, numbering just under 200,000 men. By the end of the war, it had become the largest volunteer army in history, rising to over 2.5 million men in August 1945. Serving in divisions of infantry, armour and a fledgling airborne force, they fought on three continents in Africa, Europe and Asia.
The Indian Army during British rule, also referred to as the British Indian Army, was the main military force of India until national independence in 1947. Formed in 1895 by uniting the three Presidency Armies, it was responsible for the defence of both British India and the princely states, which could also have their own armies. As stated in the Imperial Gazetteer of India, the "British Government has undertaken to protect the dominions of the Native princes from invasion and even from rebellion within: its army is organized for the defence not merely of British India, but of all possessions under the suzerainty of the King-Emperor." The Indian Army was an important part of the forces of the British Empire, in India and abroad, particularly during the First World War and the Second World War.
The Ceylon Defence Force (CDF) was established in 1910 by the Ceylonese legislation Ceylon Defence Force Ordinance, which reformed the Ceylon Volunteer Force (CVF) that existed previously as the military reserve in the British Crown colony of Ceylon. At the time of forming it was only a reserve force but soon developed into a regular force responsible for the defence of Ceylon. The CDF was under the command of the General Officer Commanding, Ceylon of the British Army in Ceylon if mobilised. However mobilisation could be carried out only under orders from the Governor.
The Royal Hong Kong Regiment (The Volunteers) (RHKR(V)) (Chinese: 皇家香港軍團(義勇軍), formed in May 1854, was a local auxiliary militia force funded and administered by the colonial Government of Hong Kong. Its powers and duties were mandated by the Royal Hong Kong Regiment Ordinance.
The Home Counties Division was an infantry division of the Territorial Force, part of the British Army, that was raised in 1908. As the name suggests, the division recruited in the Home Counties, particularly Kent, Middlesex, Surrey and Sussex.
The Assam Valley Light Horse regiment was raised in 1891 and formed part of Indian Volunteer Force, later the Indian Defence Force and finally the Auxiliary Force (India).
The Calcutta Scottish was a regiment of volunteers of Scottish descent raised in 1914 as an infantry regiment of the British Indian Army. The regiment formed part of the army reserves of the Auxiliary Force, India (AFI). The regimental dress uniform was Hunting Stewart tartan. The regiment was disbanded following India's independence in 1947.
The Bermuda Militia Artillery was a unit of part-time soldiers organised in 1895 as a reserve for the Royal Garrison Artillery detachment of the Regular Army garrison in the Imperial fortress colony of Bermuda. Militia Artillery units of the United Kingdom and Colonies were intended to man coastal batteries in times of war, which were manned by under-strength numbers of regular army gunners in peace time. The unit was embodied during both world wars, fulfilling its role within the garrison, and also sending contingents overseas to more active theatres of the wars.
At the time of Indian Independence in 1947, as per the terms of the Britain–India–Nepal Tripartite Agreement, six Gorkha regiments, formerly part of the British Indian Army, became part of the Indian Army and have served ever since. The troops are mainly from ethnic Gurkha communities of Nepal. A seventh Gorkha Rifles regiment was re-raised in the Indian Army after Independence to accommodate Gorkha soldiers of the 7th Gurkha Rifles and the 10th Gurkha Rifles who chose not to transfer to the British Army.
The Territorial Army (TA) is a military reserve force composed of part-time volunteers who provide support services to the Indian Army. It consists of officers, junior commissioned officers, non-commissioned officers and other personnel who hold ranks identical to those in the Indian Army, and also maintains civilian occupations. The primary role of the TA is to "relieve the regular army from static duties and assist civil administration in dealing with natural calamities and maintenance of essential services" and to "provide units for the regular army as and when required".
The Sri Lanka Army Volunteer Force (SLAVF) is the active-duty volunteer reserve force of the Sri Lanka Army. The SLAVF is separate from the Regular Force which consists of personal who are professional soldiers and its Regular Reserve, which comprises personal who have a mobilization obligation following their service in the regular army. The SLAVF consists of the volunteer force and the volunteer reserve; administration and recruitment of reserve personal is carried out by the Volunteer Force Headquarters in Shalawa, Kosgama which is headed by the Commandant of the Volunteer Force. It has a current strength of about 55,000 personnel. The SLAVF was known as the Ceylon Volunteer Force from 1949 to 1972 and the Sri Lanka Volunteer Force from 1972 to 1985.
The British Colonial Auxiliary Forces were the various military forces of Britain's colonial empire which were not considered part of the British Army proper.
The Haldane Reforms were a series of far-ranging reforms of the British Army made from 1906 to 1912, and named after the Secretary of State for War, Richard Burdon Haldane. They were the first major reforms since the "Childers Reforms" of the early 1880s, and were made in the light of lessons newly learned in the Second Boer War.
The Indian Defence Force (IDF) was a part-time defence force established as part of the Indian Army in 1917 in order to release regular troops from garrison duties during the First World War.
The Indian Territorial Force (ITF) was a part-time, paid volunteer military organisation within the British Indian Army, with recruits from British India. Its units were made up of European officers and Indian other ranks. It was formed in 1920, along with the Auxiliary Force, India (AFI), replacing the Indian Defence Force (IDF).
In September 1939, the British Army was in process of expanding their anti-aircraft and mobile assets. Among these new changes was the formation of Anti-Aircraft Command which was formed on 1 April 1939, and the 1st Armoured Division formed in 1937. The list below will include the British Army units, colonial units, and those units which were in the process of formation.
The Bermuda Militia Infantry was raised in 1939 as a part-time reserve of the British Army's Bermuda Garrison.