Operation Auca: Five U.S. missionaries are killed by the Waorani of Ecuador shortly after making first contact.

Operation Auca was an attempt by five Evangelical Christian missionaries from the United States to bring Christianity to the Waorani or Huaorani people of the Amazon rainforest of Ecuador. The Waorani, also known pejoratively as Aucas, were an isolated tribe known for their violence, against both their own people and outsiders who entered their territory. With the intention to evangelize the previously uncontacted Waorani, the missionaries began making regular flights over Waorani settlements in September 1955, dropping gifts, which were reciprocated. After several months of exchanging gifts, on January 3, 1956, the missionaries established a camp at "Palm Beach", a sandbar along the Curaray River, a few kilometers from Waorani settlements. Their efforts came to an end on January 8, 1956, when all five—Jim Elliot, Nate Saint, Ed McCully, Peter Fleming, and Roger Youderian—were attacked and speared by a group of Waorani warriors. The news of their deaths was broadcast around the world, and Life magazine covered the event with a photo essay.