Conservative Santiago-based government troops defeat rebels at the Battle of Loncomilla, signaling the end of the 1851 Chilean Revolution.

Pelucones was the name used to refer to Chilean aristocratic conservatives in early 19th century. The name "Pelucones" was originally used by the Pipiolos, or Liberals, as a derogatory term linking the conservatives to old fashioned wigs that were popular in the 18th century. Following the Chilean Civil War of 1829, when the Pipiolos were defeated, the Pelucones enforced the Chilean Constitution of 1833. This led to creation of a strong unitary, authoritarian and presidentialist system supported and maintained by the upper classes.

Santiago, also known as Santiago de Chile, is the capital and largest city of Chile and one of the largest cities in the Americas. It is located in the country's central valley and is the center of the Santiago Metropolitan Region, which has a population of seven million, representing 40% of Chile's total population. Most of the city is situated between 500–650 m (1,640–2,133 ft) above sea level.

The Battle of Loncomilla was the decisive battle of the 1851 Chilean Revolution between conservative government and liberal rebel forces on 8 December 1851. The conservative victory in the battle essentially crushed the revolution. The rebel army of José María de la Cruz's was aided by Mapuche chief Mañil who participated in battle with his warriors. After defeat at Loncomilla Mañil returned south. According to historian José Bengoa Mapuches saw the government in Santiago as their main enemy, explaining thus the participation of Mapuches on the side of José María de la Cruz Concepción-based revolt.

The Revolution of 1851 was an attempt by Chilean liberals to overthrow the conservative government of president Manuel Montt and repeal the Chilean Constitution of 1833. After various battles and sieges, by late December 1851 government forces had subdued the revolutionaries.