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What happened at the Battle of Cancha Rayada in 1818?

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At the Battle of Cancha Rayada, which took place in March 1818, the army led by JosĂ© de San MartĂ­n suffered a serious defeat at the hands of Spanish loyalist forces. This engagement occurred south of Rancagua, Chile, during the period between the patriot victory at the Battle of Chacabuco and the final decisive victory at the Battle of MaipĂș.1