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,
Army of the Republic of Serb Krajina Army of the Republic of Serb Krajina The Serbian Army of Krajina (, ), also known in English as the Army of the Republic of Serb(ian) Krajina, was the armed forces of the Republic of Serbian Krajina (RSK), a Serb breakaway state in Croatia during the Croatian War of Independence (1991–95). The army was officially established on 19 March 1992. The RSK covered an area of some 17,028 km² at its peak, and was located entirely inland and thus had no navy. The military, along with the self-proclaimed Republic of Serbian Krajina, dissolved in 1995 following the Croatian Operation Storm.