Maria I of Portugal forced Portugal to cede Olivença and other border towns to Spain. (This cession is not recognized by the present Portuguese government, and the country officially considers those territories still to be Portuguese possessions.) On September 29, 1801 John VI signed the Treaty of Madrid (1801), ceding half of Guyana to France, which became French Guiana. The refusal of the Portuguese government to join the French-sponsored Continental Blockade against Britain culminated in the late 1807 Franco-Spanish invasion of Portugal led by General Junot. The ultimate Napoleonic plan for Portugal was to split it into three sections. The northern parts of Portugal,
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