Employing the battle-hardened tactics developed under fire during the Battle of Tarawa, the United States launched a dual assault on the main islands of Kwajalein in the south and Roi-Namur in the north.

[citation needed] After the defeat of the Japanese, Kwajalein was developed into a major United States Military airbase and staging area for further operations by Seabees of the 109th Naval Construction Battalions [1] with CBs 74, 107, and 3rd Bn 20th Marines) assisting.

After repairing and expanding the captured Japanese airfield, the United States Army Air Forces (USAAF) moved Headquarters, Seventh Air Force from Nanumea to the airfield in April 1944, and moved the B-24 Liberator-equipped 11th Bombardment Group from Tarawa and 30th Bombardment Group from Abemama to Bucholz at the beginning of April.

[citation needed] After the war, the United States used Kwajalein as a main command center and preparation base for Operation Crossroads and an extensive series of nuclear tests (comprising a total of 67 blasts) at the Marshalls' atolls of Bikini and Enewetak.

All civil and military operations require 24 hours' prior permission, and passengers transiting through Kwajalein on the same aircraft are not permitted to deplane.