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,
Bulgaria–Romania border two countries, albeit often jointly (once per crossing). Bulgaria–Romania border The Bulgaria–Romania border is the state border between Bulgaria and Romania. For most of its length, the border follows the course of the lower Danube River up until the town of Silistra, where the river continues north into the Romanian territory. East of that point, the land border passes through the historical region of Dobruja, dividing it into Northern Dobruja in Romania and Southern Dobruja in Bulgaria. The Bulgaria–Romania border is an internal border of the European Union. However, as of neither country is part of the Schengen Area. As