Territorial Army

British military organization

Also known as: Territorial Force

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The Information Architects of Encyclopaedia Britannica

Last updated

July 14, 2026

Quick Summary

The Territorial Army is a component of the British military forces composed of individuals who are not professional soldiers. These members receive military training annually for a specified period.1

Historically, the Territorial Force was established between 1905 and 1912, later becoming known as the Territorial Army after 1921. Following World War II and with the introduction of nuclear weapons, the Territorial Army underwent significant reductions. In the aftermath of the Cold War, both the regular army and its reserve forces, including the Territorial Army, were reorganized and reduced in strength.2

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British army
…the Territorial Force (after 1921, Territorial Army) and Special Reserve were established. The army was greatly increased in size by conscription during World War I but was reduced to a minimum with an end to conscription after 1919. In July 1939, however, conscription was again enforced.
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…the Territorial Force (after 1921, Territorial Army) and Special Reserve were established. The army was greatly increased in size by conscription during World War I but was reduced to a minimum with an end to conscription after 1919. In July 1939, however, conscription was again enforced.
Read More

militia
It became the Territorial Army in 1921, and overseas service was required. During World War II the militia principle was followed in the establishment of the Home Guard. Militia forces—conscripts who undergo periodic military training until retired to an inactive reserve in middle age—constitute today the bulk of…
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It became the Territorial Army in 1921, and overseas service was required. During World War II the militia principle was followed in the establishment of the Home Guard. Militia forces—conscripts who undergo periodic military training until retired to an inactive reserve in middle age—constitute today the bulk of…
Read More