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,
U.S. Customs and Border Protection quality of life in border communities. In some areas, Agents are deputized or have peace-officer status and use it to enforce local and state/territory laws. More than 20,000 Border Patrol Agents safeguard nearly 6,000 miles of land border the United States shares with Canada and Mexico, and more than 2,000 miles of coastal waters. One of the most important activities for a United States Border Patrol Agent is "line watch". This involves the detection, prevention and apprehension of terrorists, illegal aliens and smugglers of both aliens and contraband at or near the land border by maintaining surveillance from a covert