Brazil Brazil. However, the decentralized and unorganized tendencies of the captaincy colonies proved problematic, and in 1549 the Portuguese king restructured them into the Governorate General of Brazil, a single and centralized Portuguese colony in South America. In the first two centuries of colonization, Indigenous and European groups lived in constant war, establishing opportunistic alliances in order to gain advantages against each other. By the mid-16th century, cane sugar had become Brazil's most important export, and slaves purchased in Sub-Saharan Africa, in the slave market of Western Africa (not only those from Portuguese allies of their colonies in Angola and Mozambique),
Uruguay River Uruguay River The Uruguay River (, ; , ) is a river in South America. It flows from north to south and forms parts of the boundaries of Brazil, Argentina, and Uruguay, separating some of the Argentine provinces of La Mesopotamia from the other two countries. It passes between the states of Santa Catarina and Rio Grande do Sul in Brazil; forms the eastern border of the provinces of Misiones, Corrientes, and Entre Ríos in Argentina; and makes up the western borders of the departments of Artigas, Salto, Paysandú, Río Negro, Soriano, and Colonia in Uruguay. The river measures about