sangar

1. (military, UK) A stone breastwork; a fortified niche or look-out post.Examples: "At the summits of these the enemy sharpshooters waited for them in sangars, or rock-built entrenchments, each of which had to be taken before the advance could safely continue."; "A sangar is a breastwork in the form of stonewalls built without bounding material. If stones are unavailable at or near the picket site sandbags are brought in to build the sangar."; "As the sun finally set, the rebels rushed the sangars, but were cut to pieces by the deadly accurate SAS fire."UK