VI CHILE After Pizarro had conquered Peru he dis patched Diego de Almagro with an army, in structing him to explore and take the territory to the south, or what is now Chile. He was unable to accomplish the task. In 1540 Pizarro sent another expedition under Pedro Valdivia, whom fortune favored and who penetrated to what is now the city of Santiago, which he founded in 1541. For more than 100 years the war-like Araucanian Indians made repeated attacks on settlers in this terri tory, the Spaniards having great difficulty in conquering them. A treaty of peace was con cluded in 1640. When the revolutionary movement in South America started against Spain, Chile on Sep tember 18, 1810, declared her independence, and became the scene of much fighting, finally 67