- bridgehead, foothold - an area in hostile territory that has been captured and is held awaiting further troops and supplies; "an attempt to secure a bridgehead behind enemy lines"; "the only foothold left for British troops in Europe was Gibraltar"
--1 is a kind of combat zone, combat area
--1 has particulars: airhead; beachhead - bridgehead - a defensive post at the end of a bridge nearest to the enemy
--2 is a kind of post, station