390^th Infantry Regiment

The 390th Infantry Regiment was organized at Camp Breckinridge, Kentucky, on September 15, 1942, and assigned to the 98th Infantry Division. It trained with the division, moved to the Tennessee Maneuver Area on September 6, 1943, and shifted to Camp Rucker, Alabama, on November 12. The regiment staged at Fort Lawton, Washington, on April 15, 1944, sailed from Seattle on April 28, and reached Hawaii on May 4. Its World War II overseas service centered on Hawaiian defense, not on a named ground campaign.

After arrival, the 390th served at Kauai and Oahu. The division placed the 390th on Kauai soon after landing, and the 98th then relieved the 38th Infantry Division of the Oahu ground defense mission on May 26. The regiment was attached to the 38th Infantry Division from May 26 to June 1, to U.S. Army Forces in the Central Pacific Area from June 1 to July 1, and to Central Pacific Base Command from July 1 to November 12. Those attachments reflected theater security and island defense while combat forces moved forward across the Pacific.

The 98th Division was relieved of Kauai and Maui defense missions on November 2, 1944, and assembled on Oahu. The 390th held the Oahu ground defense role until December 5, when the 389th relieved it. The division was released from Oahu defense responsibilities on May 31, 1945, and entered intensive training. On July 28 it was alerted for participation in the invasion of Japan, but Japan surrendered before the operation began. The 390th moved to Japan on October 5 for occupation duty and was inactivated there on February 16, 1946.