 He took political leadership of the expedition to Upper Peru, displacing Hipólito Vieytes, and replaced Ocampo with Colonel Antonio González Balcarce.He was informed that Cochabamba revolted in support of the Junta, but was threatened by royalist forces from La Paz.Castelli intercepted a letter from Nieto to Gutiérrez de la Concha, governor of Córdoba, who was already executed for his support of Liniers.