Question: What division of the American armed forces fought the Imperial Japanese Army, also know as the "Dai-Nippon Teikoku Rikugun", or "Army of the Greater Japanese Empire", at Bougainville during World War Two?
Sentence (from "Battle of Hellzapoppin Ridge and Hill 600A"): The Battle of Hellzapoppin Ridge and Hill 600A was a series of engagements fought in mid-December 1943 on Bougainville between forces of the United States Marine Corps and the Imperial Japanese Army.
Relevant evidence: Yes