Chilean War of Independence: rebel victories at El Quilo and Membrillar and the royalist riposte at Cancha Rayada

Background. By early 1814, Royalist forces in Chile received reinforcements from the Viceroy of Peru. In March, these forces captured the Patriot stronghold of Talca. This capture split the line of communication between the two main Patriot armies, led by Bernardo O'Higgins and Juan Mackenna. Mackenna, positioned along the Itata river, found his lines cut and his forces isolated from O'Higgins' main body in Concepción.

Patriot Defeats. The Battle of El Quilo occurred on 19 March 1814 at El Quilo on the southern bank of the Itata river. The Battle of Membrillar followed on 20 March 1814. These engagements occurred after Royalist reinforcements captured Talca, severing Patriot lines of communication. The supplied passages do not explicitly state the outcome of these specific battles, though they describe the isolation of Patriot forces.

Royalist Riposte. The First Battle of Cancha Rayada, also known as the 'Disaster' or 'Surprise', took place on 29 March 1814. A patriotic force under Manuel Blanco Encalada advanced towards Talca, which was held by the guerrilla leader Ángel Calvo. Calvo, a former patriot who had switched sides to the Royalists during the Siege of Chillán, defended the town against the Patriot advance.