 Complete the following phrase:  The breakup of the old Viceroyalty of the Río de la Plata during the 1810s eventually resulted in the emergence of independent nations of Paraguay, Bolivia and Uruguay in the northern portion of the Viceroyalty, while its southern territories coalesced into the United Provinces of the Río de la Plata. Rosas planned to restore, if not all, at least a considerable part of the former borders of the old Viceroyalty of the Río de la Plata. He never recognized the independence of Paraguay and regarded it a rebel Argentine province that would inevitably be reconquered. He sent an army under Manuel Oribe who invaded Uruguay and conquered most of the country, except for its capital Montevideo that 