History of Portugal (1640–1777) put to the test in 1762 when Spain invaded aided by France, during the Seven Years' War. Britain invoked its alliance with Portugal and sent troops. Several months later, the conflict was settled with comparatively little fighting. In 1777, Spain and Portugal signed the Treaty of San Ildefonso, which mainly resolved a number of border disputes between their South American colonies. During the Age of Enlightenment, Portugal was considered one of Europe's unenlightened backwaters; it was a country of three million with 200,000 people in 538 monasteries in 1750. Melo seems to have been deeply embarrassed by Portugal's much lamented
Border guard U.S. Customs and Border Protection and the U.S. Coast Guard are analogous to the uniformed division while U.S. Immigration and Customs Enforcement would represent the detective division. Vietnam Border Defence Force (Biên phòng Việt Nam) is a branch of Vietnam People's Army and is under command of Ministry of Defence (Vietnam). It has important roles in protecting Vietnam's sovereignty, maintaining security at land and sea borders. Vietnam Border Defence Force is established on 3 March 1959. It is organised into three levels: National Command, Provincial Command, and Local Post. Border guard A border guard of a country is a national