For the November 1943 Allied invasion, see Bougainville campaign.
Invasion of Buka and Bougainville
Part of the Pacific Theater of World War II
View of Buka (right) and Bougainville (left) islands, taken in 1943. The two islands are divided by the Buka Passage.
Date
9 March – 5 April 1942
Location
6°8′S155°18′E / 6.133°S 155.300°E / -6.133; 155.300 Buka and Bougainville Islands, Territory of New Guinea (geographically part of the Solomon Islands)
Result
Japanese forces successfully occupy the area
Belligerents
Australia
Japan
Commanders and leaders
J.M. Mackie
?
Strength
24 troops
unknown
v
t
e
Bougainville campaign
Japanese Invasion
1943
1st Cape Torokina
Empress Augusta Bay
Koromokina Lagoon
Piva Trail
Coconut Grove
Piva Forks
Cape St. George
Koiari Raid
Hellzapoppin Ridge & Hill 600A
1944
2nd Cape Torokina
Pearl Ridge
1945
Tsimba Ridge
Slater's Knoll
Hongorai River
Porton Plantation
Ratsua
Between 9 March and 5 April 1942 during World War II, forces of the Empire of Japan occupied the islands of Buka and Bougainville in the South Pacific. At that time Buka and Bougainville were part of the Australian-administered Territory of New Guinea. A platoon of Australian commandos from the 1st Independent Company was located at Buka Airfield when the Japanese landed but did not contest the invasion.
The Japanese invaded in order to construct naval and air bases to provide security for their major base at Rabaul, New Britain and to support strategic operations in the Solomon Islands. After the occupation of Buka and Bougainville, the Japanese began constructing airfields across the island.[1] The main airfields were on Buka Island, on the nearby Bonis Peninsula, and at Kahili and Kieta,[1] while naval bases were also constructed at Buin in the south and on the nearby Shortland Islands.[2] These bases allowed the Japanese to conduct operations in the southern Solomon Islands and to attack the Allied lines of communication between the US and the Southwest Pacific Area.[1]
In November 1943, Allied forces landed on the west coast of Bougainville as part of the latter stages of Operation Cartwheel and began building air bases to assist in the isolation and neutralization of Rabaul. U.S. Marines landed at Cape Torokina[1] and established a beachhead within which the Allies eventually constructed three airfields. The invasion force was later replaced by U.S. Army soldiers in January 1944,[1] and these were replaced by Australian Militia troops in October 1944.[3] The campaign ended with the surrender of Japanese forces in August 1945.[4]
^ abcdeKeogh 1965, p. 414.
^Murray 2001, pp. 169–195; Spector 1985, pp. 152–53.
^Maitland 1999, p. 108.
^Keogh 1965, p. 420.
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