he sent a military expedition by sea under the command of Antonio Pareja to deal with the situation in Chile, and sent another force by land to attack northern Argentina. The troops landed in Concepción, where they were received with applause. Pareja then attempted to take Santiago. This effort failed, as did a subsequent inconclusive assault led by Gabino Gaínza. However, this was not due to the military performance of Carrera, whose incompetence led to the rise of the moderate O'Higgins, who eventually took supreme control of the pro-independence forces. Harassed on all sides, Carrera resigned, in what is commonly taken to mark the beginning of the period of the Reconquista. After the attempt by Gaínza, the two sides had signed the Treaty of Lircay on May 14, nominally bringing peace but effectively only providing a breathing space. Abascal had no intention of honoring the treaty, and that very year sent a much more decisive force southwards, under the command of Mariano Osorio. The royalist force landed and moved to Chillán, demanding complete surrender. O'Higgins wanted to defend the city of Rancagua, while Carrera wanted to make the stand at the pass of Angostura, a more felicitous defensive position but also closer to Santiago. Because of the disagreements and resulting lack of coordination, the independence forces were divided, and O'Higgins was obliged to meet the royalists at Rancagua without reinforcements. The resulting battle, the Disaster of Rancagua, on October 1 and 2 of 1814, was fought fiercely, but ended in stunning defeat for the independence forces of which only 500 of the original 5,000 survived. A little while later, Osorio entered Santiago and put the rebellion of the Patria Vieja to an end. Reconquista The viceroy Abascal confirmed Mariano Osorio as governor of Chile, although a later disagreement between the two would result in Osorio's removal and the installation of Francisco Casimiro Marcó del Pont as governor in 1815. In any case, the Spanish believed that it was necessary to teach the revolutionaries a good lesson and embarked on a campaign of fierce political persecution, led by the infamous Vicente San Bruno. The patriots found in Santiago—among whom were members of the First Junta—were exiled to the Juan Fernández Islands. Far from pacifying the patriots, these actions served to incite them, and soon even the most moderate concluded that anything short of independence was intolerable. A large group of patriots