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,
History of the Army of the Republic of Bosnia and Herzegovina coalition government. On 19 December 1990 Alija Izetbegović and the SDA party alarmed by the SDS's secessionists attitudes discussed forming an independent Bosnian army later Army of the Republic of Bosnia and Herzegovina. In March 1991 Sefer Halilović formed the Patriotic League (Patriotska Liga - PL) as an independent Bosnian army, with the same territorial organization as the TO. On 1 November 1991 the JNA, Bosnian-Serb and Serbian paramilitary militias began attacking Bosnian-Muslim and Bosnian-Croat towns and villages the first ones being Sarajevo by the JNA and Bijeljina by paramilitary forces. On 4 April, Alija Izetbegović ordered general mobilization: and