The United Restoration Army, also called simply as the Restoration Army, was a land military force that operated between the years 1837 and 1839, which had the objective of ending the Peru-Bolivian Confederation, led by General Andrés de Santa Cruz, and restore the independence of Peru to its situation prior to the Salaverry-Santa Cruz War.

[1][2] Among its members were the North Peruvian military and politicians Juan Crisóstomo Torrico and Ramón Castilla, among others, who were exiled in Chile.

There were also General Manuel Ignacio de Vivanco, Andrés Martínez and the politician Felipe Pardo y Aliaga, who negotiated the deal with Chile to intervene in favor of the North-Peruvian State, joining forces in order to break the Confederation.

[3] Likewise, former North Peruvian president Agustín Gamarra and his followers were also refugees, who finally formed an alliance with Chile in 1838 to establish a new government in Peru.

[4] The defeat of the Peru-Bolivian Confederation occurred in the town of Villa de Yungay, in the Department of Huaylas on January 20, 1839.