Beginning Process_start the offensive , United States Marine Corps and United States Army forces , with support Supporting from the United States Navy , executed landings on Saipan in June 1944 .

After heavy fighting , Saipan was secured Preventing_or_letting in July and Guam and Tinian in August 1944 .

The U.S. then constructed airfields on Saipan and Tinian where B-29s were based to conduct strategic bombing missions against the Japanese mainland until the end of World War II , including the nuclear attacks on Hiroshima and Nagasaki .

In response Response to this , all residents on the island were evacuated Emptying to nearby Saipan .

The typhoon also brushed Rota , causing Causation $ 2.5 million in damage Damaging there , as well as Saipan .