MARINES IN CAMOUFLAGE SUITS hit the narrow beach at Empress Augusta Bay, Bougainville, on D Day, 1 November 1943. Prior to the landing on Bougainville, the Treasury Islands were seized and developed as a staging area for landing craft, and diversionary landings were made on Choiseul in preparation for a surprise attack at Bougainville.
https://www.milsurps.com/images/impo...Japan123-1.jpg