The following month, the 8th Brigade participated in the Battle of the Treasury Islands. This involved landings to secure the Treasury Islands from the Japanese in order to conduct future operations on Bougainville. It was to be the first opposed amphibious landing carried out by New Zealand troops since the Gallipoli campaign in 1915. The 34th Battalion was tasked with securing Stirling Island, which military intelligence believed to be unoccupied, while at around the same time the 29th and 36th Battalions would land on Mono Island to deal with the Japanese garrison. To assist the efforts on Mono Island, one company of 34th Battalion was detached to form part of "Logan Force", commanded by Major Logan, formerly of 34th Battalion. This was a small battle group, which also included a section of machine gun troops, to provide security for American construction and technical personnel that would be landed at Soanotalu, on the north coast of Mono Island, to establish a radar station.