Once under American control, a massive construction project was begun on the island, and the Japanese airfield was repaired and expanded, being named as West Field because of its geographical location.

The groups had struck such Japanese targets as transportation centers, naval installations, iron works, and aircraft plants in Burma, Thailand, China, Japan, the Netherlands East Indies, and Formosa.

In December 1944, the Joint Chiefs of Staff made the decision that the 58th Bombardment Wing's B-29s would be moved to the newly captured islands in the Marianas in the Central Pacific with airfields built on them to support their operations.

Its units made daylight attacks from high altitudes on strategic targets, participated in nighttime incendiary raids on urban areas, and dropped mines in Japanese shipping lanes.

After the Japanese surrender, groups of the 58th Bomb Wing dropped food and supplies to Allied prisoners of war in Japan, Korea, and Formosa, and took part in show of force missions.

Those plans never materialized, however in 1983, a lease agreement covering these lands was signed and the United States Department of Defense assumed control and possession over the northern two-thirds of Tinian.