7.000 Inca warriors were defeated by 128 Spanish invaders in the Battle of Cajamarca, the first warfare between Peru's Inca Army and Spanish Army.
Francisco Pizarro led the charge. He was a Spanish conquistadora soldier who sought wealth and power for his own personal gain. King Charles I himself supported Pizarro's explorations and conquests. When he and his troops arrived in Peru, he learned that the people who controlled the area, the Incas, had just gone through a civil war. Pizarro took this to mean that the people were weak and that this was a good time to strike.
Pizarro had 180 men and 27 horses when he rode into the town of Cajamarca. Historians state that only 12 of these men had firearms. The new emperor, Atahualpa, lived in Cajamarca, and Pizarro arranged a meeting with him. Prior to the meeting, Pizarro placed his troops around the area where they were anticipating that Atahualpa would arrive and stored artillery in a centrally-located stone structure.
Atahualpa arrived with roughly 7,000 men who were armed with knives and bolas. Upon Atahualpa's arrival, a man named Vincente de Valverde approached him and urged him to accept the Catholic faith. One version of the story describes the emperor as accepting a Bible from de Valverde and then throwing it on the ground. Pizarro's men attacked the emperor and his men shortly after Atahualpa's refusal to accept Catholicism.
The men who were hidden nearby began shooting at the Incas, and the shock was devastating the Incas had never seen firearms before.Roughly 2,000 Incas died and the rest were captured. The Spanish casualties were only 5 men. The Spanish took over the Incan camp and stole all of their riches, including gold, emeralds, and silver.