Battle of Rancagua

The Battle of Rancagua, also known as the Disaster of Rancagua, occurred in October 1814 when the Spanish under Mariano Osorio defeated rebel Chilean forces, putting an end to the independent Chilean Patria Vieja, beginning the Reconquista period of Spanish rule.

Background
When Spain heard about the Patriot victories in Chile, they sent a giant army of Spanish soldiers and royalists to defeat the rebellion. When O'Higgins heard about the besieged army in Rancagua, he went with his army of 1,000 patriots, to reinforce Juan Carrera's army in Rancagua. Outnumbered and with barely enough supplies, O'Higgins decided to make his last stand in Rancagua.

The Battle
The battle began on the morning of 1 October, when the Spanish attacked. The Spanish surrounded the town, trapping the entire Chilean army. The fighting was fierce, with the patriots driving back the Talavera regiment three times. Fighting continued on until the evening, when Osorio pulled back his army, suffering heavy casualties. O'Higgins knew the battle was lost, with his army being low on ammunition and supplies. He was promised reinforcements from Santiago, but they never came. Fighting continued on the next day, until O'Higgins ordered his men to fight their way out as best as they could and disperse in the countryside, to avoid a Spanish retribution. O'Higgins managed to make his way past the royal troops and retreat to the capital, where his opponents entered without resistance a few days later. This led to the harsh reconquista rule of Chile.

Aftermath
After Rancagua fell, the Spanish quickly captured Santiago a few days later defeating the rebellion.