In November 1810 he sent a plan to the Junta: to cross the Desaguadero river, border between the two viceroyalties, and take control of the Peruvian cities Puno, Cuzco and Arequipa. Castelli argued that it was urgent to rise against Lima, because its economy depended largely on those districts and if they lose their power over the main royalist stronghold would be threatened. The plan was rejected as too risky, and Castelli was required to comply with the original orders. Castelli obeyed as ordered.