evidence: Gibraltar, a British Overseas Territory, located at the southern tip of the Iberian Peninsula, is the subject of a territorial claim by Spain. It was captured in 1704 during the War of the Spanish Succession (1701–1714). The Spanish Crown formally ceded the territory in perpetuity to the British Crown in 1713, under Article X of the Treaty of Utrecht. Spain later attempted to recapture the territory during the thirteenth siege (1727) and the Great Siege (1779–1783). British sovereignty over Gibraltar was confirmed in later treaties signed in Seville (1729) and the Treaty of Paris (1783). [...] The Gibraltar Government has also argued that Gibraltar is a British territory and therefore by definition not an integral part of any other state, implying that Spain's territorial integrity cannot be affected by anything that occurs in Gibraltar: "Even if integration of a territory was demanded by an interested State it could not be had without ascertaining the freely expressed will of the people, the very sine qua non of all decolonisation." [...] - History of Gibraltar - Gibraltar es español