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,
Independence of Paraguay Independence of Paraguay Independence of Paraguay "de facto" started on May 14 of 1811 after the Revolution of May 14 when a local ruling junta was created. In early 1811 Paraguayan forces had repeatedly defeated the Argentinian army which considered Paraguay to be a break-away province. On October 12, 1813 the Paraguayan Republic was proclaimed. Officially Independence was proclaimed only on November 25, 1842. Paraguayan independence was assured only after the Paraguayan War, when the Empire of Brazil resisted Argentine offers to divide and annex the country. In 1776 Spanish king Carlos III created Viceroyalty of the Río de la