What is the name of the river that marks the southern boundary of Pedro de Valdivia's conquests in Chile?
Amazon
Biobío
Maule
Imperial
Answer
The Biobío River marks the southern boundary of Pedro de Valdivia's conquests in Chile. He extended Spanish rule south to the Biobío River in 1546, which became a natural border between the Spanish-controlled territory and the unconquered Mapuche lands.
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