On November 16, 1532, Francisco Pizarro, the Spanish explorer and conquistador, springs a trap on the Incan emperor, Atahualpa. With fewer than 200 men against several thousand, Pizarro lures Atahualpa to a feast in the emperor's honor and then opens fire on the unarmed Incans. Pizarro's men massacre the Incans and capture Atahualpa, forcing him to convert to Christianity before eventually killing him.
Pizarro's timing for conquest was perfect. By 1532, the Inca Empire was embroiled in a civil war that had decimated the population and divided the people's loyalties. Atahualpa, the younger son of former Incan ruler Huayna Capac, had just deposed his half-brother Huascar and was in the midst of reuniting his kingdom when Pizarro arrived in 1531, with the endorsement of Spain's King Charles V. On his way to the Incan capital, Pizarro learned of the war and began recruiting soldiers still loyal to Huascar.
Realizing Atahualpa was initially more valuable alive than dead, Pizarro kept the emperor in captivity while he made plans to take over his empire. In response, Atahualpa appealed to his captors' greed, offering them a room full of gold and silver in exchange for his liberation. Pizarro consented, but after receiving the ransom, Pizarro brought Atahualpa up on charges of stirring up rebellion. By that time, Atahualpa had played his part in pacifying the Incans while Pizarro secured his power, and Pizarro considered him disposable. Atahualpa was to be burned at the stake—the Spanish believed this to be a fitting death for a heathen—but at the last moment, Valverde offered the emperor clemency if he would convert. Atahualpa submitted, only to be executed by strangulation. The day was August 29, 1533.
taken from: http://www.history.com/this-day-in-history/pizarro-traps-incan-emperor-atahualpa [16.11.2012]