Why did Pizarro and his men attack the Inca empire?

Pizarro and his men attacked the Inca Empire primarily to seek wealth and resources, particularly gold and silver, which were abundant in the region. Motivated by the Spanish desire for conquest and expansion, they aimed to exploit the Incas' riches and establish Spanish dominance. Additionally, the political instability within the Inca Empire, exacerbated by internal conflict and a recent civil war, provided an opportune moment for the Spanish to invade and seize power.