Bolivia–Spain relations and Antonio José de Sucre entered Peru and defeated the Spanish forces in the country. Soon afterwards, troops led by Antonio José de Sucre entered Upper Peru and fought against royalist forces. By 1825, Upper Peru was free from Spanish authority. Originally, Bolívar wanted Upper Peru to join either Peru or Argentina, however, the people of Upper Peru convinced Bolívar and Sucre to give autonomy to the territory and on 6 August 1825, an Upper Peruvian congress declared the country independent and renamed the territory "Bolivia" in honor of Simón Bolívar and named its capital "Sucre" in honor of Antonio
First Upper Peru campaign bulk of the royalist forces, while the center was hit by the soldiers of Pio Tristan. Many patriotic soldiers recruited at the Upper Peru surrendered or fled, and many of the recruits in La Paz switched sides during the battle. The Saavedrist Juan José Viamonte was instrumental in the defeat, by refusing to join the conflict. Although the casualties of the Army of the North were not substantial, it was left desmoralized and disbanded. The inhabitants of Upper Peru left them and welcomed the royalists back, so the army had to quickly leave those provinces. However, the resistance of Cochabamba