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,
Federal Republic of Mindanao Federal Republic of Mindanao The Federal Republic of Mindanao is a proposed country encompassing Mindanao, Palawan and Sulu of the Philippines. The independence of the republic was to be proclaimed at a convention in Cagayan de Oro on April 25, 1986 by the Mindanao People's Democratic Movement led by Reuben Canoy but original plans to proclaim the proposed republic's independence were changed to avert arrest by the Corazon Aquino administration due to violation against sedition law. A 31-paged constitution was signed as a move to declare intent to proclaim an independent federal state and the flag of the proposed state