At dawn on 31 March 1942, a dozen Japanese bombers launched the attack, destroying the radio station. The same day, a Japanese fleet of nine vessels arrived, and the island was surrounded. About 850 men of the Japanese 21st and 24th Special Base Forces and 102nd Construction Unit came ashore at Flying Fish Cove and occupied the island. They rounded up the workforce, most of whom had fled to the jungle. Sabotaged equipment was repaired and preparations were made to resume the mining and export of phosphate. Only twenty men from the 21st Special Base Force were left as a garrison.