Why did the chickasaw attack de soto expedition?

The Chickasaw attacked Hernán de Soto's expedition in 1540 primarily to defend their territory and resist Spanish encroachment. De Soto's expedition was marked by violent encounters with Indigenous tribes as they sought gold and resources, which posed a direct threat to the Chickasaw's way of life. The Chickasaw, recognizing the danger posed by de Soto's well-armed forces, aimed to protect their land and assert their autonomy against European colonization efforts. This conflict was part of the broader resistance by Native American groups against European explorers and conquerors during this period.