A sangar (or sanger) (Persian: سنگر) is a temporary fortified position with a breastwork originally constructed of stones, and now built of sandbags and similar materials. Sangars are normally constructed in terrain where the digging of trenches would not be practicable. The term is still frequently used by the British Army.
The word was adopted from Persian and Pashto and derives originally from the Persian word sang, "stone". Its first appearance in English (as recorded by the Oxford English Dictionary) is in the form sunga, and dates from 1841. The word is found throughout Indo-Persian settlements as a surname.
The term was originally used by the British Indian Army to describe small temporary fortified positions on the North West Frontier and in Afghanistan. It was widely used by the British during the Italian Campaign of World War II.
More recently, the use of the term has been extended to cover a wider range of small, semi-permanent fortified positions. The Independent Monitoring Commission stated immediately after The Troubles in Northern Ireland:
The British Army use other terms to classify their sites covered by our definition [of towers and observation posts]. For the avoidance of any doubt we set out below the military terms we have deemed to be included in this part of the report.