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 del Tuyú La Costa District helped further promote the town, and numerous pubs, bingo parlors, discothèques, and theatres were established in subsequent years, notably along Costanera and San Bernardo Avenues, and Chiozza Street, which was designated a pedestrian promenade for the summer high tourist season (January 1March 10). Among the best-known points of interest on this latter is the Observatorio de la Costa, the district's only observatory. San Bernardo del Tuyú San Bernardo del Tuyú is a city in the seaside La Costa District of the Province of Buenos Aires, Argentina. Founded by the "Compañía Inmobiliara del Este Argentino S.R.L.", a partnership