John Allen Chau

John Allen Chau (December 18, 1991 – November 17, 2018) was an American Christian missionary who was killed by the Sentinelese, a tribe in voluntary isolation, after illegally traveling to North Sentinel Island in an attempt to evangelize.

Born in Scottsboro, Alabama, Chau became interested in converting the Sentinelese while in high school, inspired by the work of other pioneer missionaries. In preparation, he participated in missionary trips to Mexico, Israel, Iraq, and the Andaman Islands. He also underwent "boot camp"–style training conducted by the evangelical organization All Nations, which included mock scenarios coordinated by missionary staff who pretended to be hostile tribespeople.