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,
Lithuania–Poland border Lithuania–Poland border The current Lithuania–Poland border exists since the re-establishment of the independence of Lithuania on March 11, 1990. Until then the identical border was between Poland and Lithuanian SSR of the Soviet Union. The length of the border is . It runs from the Lithuania–Poland–Russia tripoint southeast to the Belarus–Lithuania–Poland tripoint. It is the only land border that the EU- and NATO-member Baltic states share with a country that is not a member of the Russian-aligned Commonwealth of Independent States. To the military planners of NATO, the border area is known as the Suwalki gap (named after the nearby