Peru–Bolivian Confederation Felipe Salaverry, who rebelled and overthrew him in 1835. Orbegoso, however, did not lose the support of southern Peru and called in to his help the president of Bolivia. It was the opportunity that Marshal Santa Cruz, himself a former president of Peru, was waiting for. The Bolivian army promptly proceeded to invade Peru. With Bolivian help, General Orbegoso quickly regained his leadership throughout the country and had Salaverry executed. As a reward for the support he had received from Santa Cruz, he agreed to the formation of the new Peru–Bolivian Confederation. Santa Cruz assumed the "supreme protectorship" of the
First Upper Peru campaign authorities. The May Revolution, in Buenos Aires, was more successful, and ousted the viceroy Baltasar Hidalgo de Cisneros. The Primera Junta, which replaced him, prepared a military expedition to Upper Peru to secure the control of the area, while another expedition headed to Paraguay. Before proceeding to Upper Peru, this military campaign defeated a counter revolution in Córdoba, organized by the former viceroy Santiago de Liniers. Ortiz de Ocampo disobeyed orders to execute the prisoners, sending them to Buenos Aires instead. As a result, the Junta appointed Juan José Castelli as commander of the Army of the North instead of