The Battle Hostile_encounter of the Koromokina Lagoon was fought Hostile_encounter between the United States Marine Corps and Imperial Japanese Army forces Military_operation on Bougainville Island .

It took place Process_start on 7–8 November 1943 during the Bougainville campaign Military_operation .

After the battle Hostile_encounter , Allied forces Military_operation continued to expand Expansion their beachhead on Bougainville with the goal of constructing airfields to attack Attack and neutralize Japanese forces Military_operation located at Rabaul and nearby areas .

Between 9 March and 5 April 1942 during World War II , forces of the Empire of Japan occupied Control the islands of Buka and Bougainville in the South Pacific .

After the occupation of Buka and Bougainville , the Japanese began Process_start constructing a number of airfields across the island .

In November 1943 , allied forces landed Self_motion on the west coast of Bougainville as part of the latter stages of Operation Cartwheel , and began Process_start building air bases to assist in the isolation and neutralization of Rabaul .

Isoroku Yamamoto , commander of the Combined Fleet of the Imperial Japanese Navy , was killed Killing on Bougainville Island when his transport bomber aircraft was shot down Use_firearm by United States Army Air Forces fighter aircraft operating Being_in_operation from Kukum Field on Guadalcanal .