number of confrontations between the hosts of Valdivia and those of Michimalonco, at the end of 1543 the Spanish managed to finish controlling the valleys of Cachapoal, Maipo and Aconcagua with the conquest by Pedro de Valdivia of three forts that Michimalonco maintained in the Andean mountain range of the Aconcagua River, which causes the withdrawal of Michimalonco's forces towards the north.

In 1544 Michimalonco headed to the Limarí River valley to cut off land communications between Chile