Argentine War of Independence Chile, allied with the Mapuches. On April 4, Argentine Colonel Juan Gregorio de Las Heras had occupied Concepción, but the Royalists retreated to Talcahuano. In early 1818, Royalist reinforcements from the Viceroyalty of Peru arrived, commanded by general Mariano Osorio, and advanced towards the capital. San Martín then turned to scorched earth tactics and ordered the evacuation of Concepción, which he thought was impossible to defend. On 18 February 1818, the first anniversary of the battle of Chacabuco, Chile declared its independence from the Spanish Crown. On March 18, 1818, Osorio led a surprise attack on the joint Argentine-Chilean army,
Palmares (quilombo) This government was confederate in nature, and was led by an elected chief who allocated landholdings, appointed officials (usually family members), and resided in a type of fortification called Macoco. Six Portuguese expeditions tried to conquer Palmares between 1680 and 1686, but failed. Finally the governor of the captaincy of Pernambuco, Pedro Almeida, organized an army under the leadership of the Bandeirantes Domingos Jorge Velho and Bernardo Vieira de Melo and defeated a palmarista force, putting an end to the republic in 1694. Palmares was the general name given by the Portuguese in Pernambuco and Alagoas to the interior districts