What was Pizarro's advantage over the Inca?

Guns

Explanation:

Pizarro was a Spanish conquistador and traveled to the Americas. Once there he met the Incas, the Inca hadn't been exposed to gunpowder until the rifles and cannons of the Spaniards were trained on them. The Inca's primitive weapons (spear, bow, etc ...) were no where near the power of Pizarro's guns and cannons.