Elsewhere, further actions took place on Arundel Island in August and September after Japanese forces withdrew there after the fighting around Munda Point. A large number of Japanese troops concentrated on Kolombangara late in the campaign, but were bypassed by US troops who landed on Vella Lavella in mid-August and were later reinforced by New Zealand troops. The campaign ended on 7 October 1943 when the last Japanese troops were withdrawn from Vella Lavella, finalizing the Allied capture of the islands.