The battalion returned to the United States after the war and was decommissioned on 30 November 1945 at Marine Corps Base Camp Pendleton, California.

On November 11, 1944, the battalion was transferred to the 1st Provisional Antiaircraft Artillery Group prior to deploying for combat operations in the Western Pacific.

The battalion continued training on Kauai until December 12, 1944 when it received a dispatch ordering it to quickly prepare for deployment to Tinian.

[5] On March 12, 1945, the assault echelon of the battalion departed Tinian and sailed towards Okinawa, Japan for the upcoming amphibious landing.

The assault echelon disembarked naval shipping on April 8, 1945 and was initially responsible for providing air defense for the 1st Marine Division.

On April 20 the battalion was retasked to provide light anti-aircraft protection for the III Marine Amphibious Corps landing at Hagushi and supplement the defenses of Yontan Airfield with their heavy antiaircraft guns.