The Defensible Barracks is a fortified barracks located at Europa Flats in the British Overseas Territory of Gibraltar. The British defensive strategy in Gibraltar predominately focused on keeping enemies at a distance through the use of artillery. There were few inner lines of defence to address the risk of an enemy getting through the outer line. However, the southern tip of Gibraltar, Europa Point, was long felt to be potentially vulnerable to a surprise attack from the sea and was heavily fortified with gun batteries, perimeter walls and scarped cliffs.