Military units and formations by type

300px|right|thumb|"Arrival of the dean fleet", showing the garrison of Malta in 1565 and the Ottoman invasion force.

thumb|300px|Late 18th century barracks from the reign of George III, [[Edinburgh Castle, Scotland]] Barracks are buildings used to accommodate military personnel and quasi-military personnel such as police. The English word originates from the 17th century via French and Italian from an old Spanish word 'soldier's tent', but today barracks are usually permanent buildings. The word may apply to separate housing blocks or to complete complexes, and the plural form often refers to a single structure and may be singular in construction.

military concept