evidence: In the 1810s, some of the elites of the territory located on the eastern bank of the Uruguay River joined the uprising that had begun in Buenos Aires. This support for the Buenos Aires junta—the outcome of demands for the expansion of jurisdiction and greater autonomy—divided the territory between the administration of Montevideo (until 1814 in the hands of Españolistas) and a revolutionary group. In this context, a radical popular revolutionary project was produced under the leadership of José Artigas (1764–1850). This sought a federal union with other provinces along the Uruguay River and became known as the System of Free Peoples. It encountered fierce resistance from the authorities in Buenos Aires. The radicalization of certain postures among the "Orientales" (as the people in what is now Uruguay were called) was rejected by the Creole elites, who abandoned the Artiguista group and imposed restraints on the social revolution. Added to this were the occupation of the territory by Luso-Brazilian forces (who had strong local support) and the transformation of the Oriental Province into the Cisplatin Province, since 1821 part of the Portuguese Empire.