Raid on Koiari

Koiari Raid
Part of the Bougainville Campaign in the Pacific Theater (World War II)
Marines from the 1st Parachute Battalion on the beach at Koiari 29 November 1943
Date 28–29 November 1943 Location Bougainville in the South Pacific Result Japanese victory
Belligerents
United States	Japan
Commanders and leaders
Roy Geiger Richard Fagan	Masatane Kanda Shun Iwasa
Strength
614	Est. 1,200
Casualties and losses
15 dead 99 wounded 7 missing	Est. 145–291 killed

The Raid on Koiari was a battle that occurred between 28 and 29 November 1943 in the Pacific theater of World War II between American and Japanese forces. Part of the Bougainville campaign, the raid involved a landing by a battalion-sized force of United States Marines to harass Imperial Japanese Army troops on Bougainville Island. The raid was a failure for the Americans as they were attacked by a larger-than-expected Japanese force and as a result the Marines were withdrawn from the beachhead without having achieved any of their objectives.