The Australian Army served in numerous theatres and campaigns throughout World War II, earning distinction and at times facing significant challenges. After Australia declared war on Germany on 3 September 1939, Australians deployed and served in combined Allied armies in Europe, North Africa, the Middle East and Asia.1 Conversely, the Australian Army made up the bulk of Allied ground forces in the South West Pacific Area (SWPA) during the Japanese push south in the months following the attack on Pearl Harbor. After the consolidation of their initial advances, the Japanese extended their area of control and established a perimeter line of defence from the Aleutians in the north to the Gilbert and Marshalls in the south. In 1942–43, Australian troops carried the bulk of responsibility in the fight against the Imperial Japanese Army and Navy in a gruelling battle for the island of New Guinea. Thus, by 1943, the Australian Army was the most experienced Allied force in the Pacific.