The next phase began on 10 June when the 9th Division conducted simultaneous assaults in north-west Labuan and on the coast of Brunei. While Brunei was quickly secured, the Japanese garrison on Labuan held out for over a week. After the Brunei Bay region was secured the 24th Brigade was landed in North Borneo and the 20th Brigade advanced along the western coast of Borneo south from Brunei. Both brigades rapidly advanced against weak Japanese resistance and most of north-west Borneo was liberated by the end of the war. During the campaign the 9th Division was assisted by indigenous fighters who were waging a guerrilla war against Japanese forces with the support of Australian special forces such as Z Special Unit.