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,
San Bernardo Unido the clashes with Deportes Provincial Osorno stand out, in which I finish last with 10 points, having to play the Liguilla de Permanencia. In that instance, the end was dramatic, in which San Bernardo Unido arrived at the bottom of the table to the last confrontation, where he faced in the Municipal Stadium of San Bernardo Juventud Puente Alto, with whom he disputed the permanence, the party ended 6 to 2, in favor of San Bernardo Unido, that result made it difficult for him to return to his Association of Origin. I finish finally second of that phase with 7