Battle of Borneo (1941–1942)
The Battle of Borneo was the successful campaign by the Empire of Japan for control of British Borneo and Dutch Borneo. == Background == Balikpapan in Dutch Borneo, was a key Japanese target since oil from Samarinda and Sanga Sanga was refined, stored, and shipped there, besides having an airfield from which attacks could be launched against Java.
Source: Wikipedia — Battle of Borneo (1941–1942) (CC BY-SA 4.0)