 Complete the following phrase:  Gibraltar, a British Overseas Territory, located at the southern tip of the Iberian Peninsula, is the subject of an irredentist territorial claim by Spain. It was captured in 1704 during the War of the Spanish Succession 17011714. The Spanish Crown formally ceded the territory in perpetuity to the British Crown in 1713, under of the Treaty of Utrecht. Spain later attempted to recapture the territory during the thirteenth siege 1727 and the 