The 371st Independent Infantry Battalion was destroyed on Labuan by the 24th Brigade during 11 days of at times fierce fighting. The 367th Independent Infantry Battalion retreated from Brunei to the Trusan River as a formed unit, and the 366th Independent Infantry Battalion broke up into small groups as it fought a rearguard action against the Australian 20th Brigade. While Beaufort was attacked by the 24th Brigade, the 368th Independent Infantry Battalion was not involved in its defence.