Military districts (also called military regions) are formations of a state's armed forces (often of the Army) which are responsible for a certain area of territory. They are often more responsible for administrative than operational matters, and in countries with conscript forces, often handle parts of the conscription cycle.
Navies have also used a similar model, with organizations such as the United States Naval Districts. A number of navies in South America used naval districts at various points in time.
Source: Library of Congress Country Study, 1993, 258-260
Algeria is divided into six numbered military regions, each with headquarters located in a principal city or town (see People's National Army (Algeria)#Military regions). This system of territorial organization, adopted shortly after independence, grew out of the wartime wilaya structure and the postwar necessity of subduing antigovernment insurgencies that were based in the various regions. Regional commanders control and administer bases, logistics, and housing, as well as conscript training. Commanders of army divisions and brigades, air force installations, and naval forces report directly to the Ministry of National Defence and service chiefs of staff on operational matters. Previously Algeria had formed France's tenth military region.
Military region commanders in 2003 included Brahim Fodel Chérif (1st Military Region), Kamel Abderrahmane (2nd Military Region, Abcène Tafer (3rd Military Region), Abdelmadjid Sahed (4th Military Region, Chérif Abderrazak (5th Military Region) and Ali Benali (6th Military Region).
There were 76 northern military districts or military regions (軍區), or war areas, which were the largest formations of the National Revolutionary Army, under the Military Affairs Commission, chaired by Chiang Kai-shek during the Second Sino-Japanese War and World War II. During the Second Sino-Japanese War the National Revolutionary Army eventually organized itself into twelve Military Regions.