The only great battle of the campaign happened on 29 November 1815. When the patriot army was situated north of Venta y Media, nearing Cochabamba they found the army commanded by General Pezuela and fought the Battle of Sipe-Sipe which ended in a defeat for the rebels. The 3,500 men and 9 artillery pieces could not deal with the 5,100 royalists and 23 artillery pieces and had to escape with about 1,000 casualties, while the royalists only counted 32 dead.