In the Pacific Theater of World War II, the Gilbert and Marshall Islands campaign, from November 1943 through February 1944, were key strategic operations of the United States Pacific Fleet and Marine Corps in the Central Pacific. The purpose was to establish airfields that would allow land based air support for the upcoming operations across the Central Pacific. The campaign began with a costly three-day battle for the island of Betio at the Tarawa atoll. The campaign was preceded a year earlier by a diversionary raid on Makin Island by U.S. Marines in August 1942.