Question: What major event led to Louis Zamperini's incarceration?
Sentence (from "Ōfuna prisoner-of-war camp"): The Ōfuna Camp (大船収容所 , Ōbune shūyōsho ) was an Imperial Japanese Navy installation located in Kamakura, outside Yokohama, Japan during World War II, where high-value enlisted and officers, particularly pilots and submariner prisoners of war were interrogated and incarcerated by Japanese naval intelligence Richard O'Kane, Louis Zamperini and Gregory Boyington were among the prisoners held at Ōfuna.
Relevant evidence: Yes