The beginning of the Pacific War—and the rapid advance of Japanese forces—threatened the Australian mainland for the first time in its history. The RAAF was quite unprepared for the emergency, and initially had negligible forces available for service in the Pacific. In 1941 and early 1942, many RAAF airmen, including Nos. 1, 8, 21 and 453 Squadrons, saw action with the RAF Far East Command in the Malayan, Singapore and Dutch East Indies campaigns. Equipped with aircraft such as the Brewster Buffalo, and Lockheed Hudsons, the Australian squadrons suffered heavily against Japanese Zeros.