Through wars against the French, the Portuguese slowly expanded their territory to the southeast, taking Rio de Janeiro in 1567, and to the northwest, taking São Luís in 1615. They sent military expeditions to the northwest of the South American continent to the Amazon River basin rainforest and conquered competing English and Dutch strongholds, founding villages and forts from 1669. In 1680 they reached the far southeast and founded Sacramento on the bank of the Rio de la Plata, in the "Banda Oriental" region (present-day Uruguay).