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,
Norway–Russia border that police and customs authorities would have to be regularly stationed at the border. A large amount of the initial traffic was from Russians who sold crafts and souvenirs at markets and fairs throughout Finnmark. From 1992 Norwegian authorities introduced limitations on the activity, resulting in a reduction in trans-border traffic. However, by 1998 the traffic had nearly hit 100,000. From 1991 to 1999 (Poland joining NATO), Norway was the only NATO country to share a land border with Russia. This caused a decrease in allied interest in Norway's border issue, leaving Norway more to itself in managing the relationship.