During World War II, while Kenya was a British colony, Kilindini became the temporary base of the British Eastern Fleet from early 1942 until the Japanese naval threat to Colombo, Ceylon (now Sri Lanka) had been removed. Nearby, the Far East Combined Bureau, an outstation of the British code-breaking operation at Bletchley Park, was housed in a requisitioned school (Allidina Visram High School, Mombasa) and had success in breaking Japanese naval codes.[5][6]