Probably few of the 685,407 Americans sent to the Southwest Pacific Area (SWPA) through 1944 knew much about New Guinea prior to Japan's attack on Pearl Harbor—initiating the American entrance into World War II. Nevertheless, the New Guinea campaign began in summer 1942 when Japan attempted to isolate Australia through an overland attack from Buna to Port Moresby. This attack resulted in the first American action on that mountainous and jungle‐covered island. After the Australians successfully defended Port Moresby along the Kokoda Trail, U.S. forces launched an unsuccessful strike against the Japanese at Buna on the island's northern coast. Impatient with the lack of progress, Gen. Douglas MacArthur, chief of SWPA, replaced the commander, Maj. Gen. Edwin Forrest Harding, with Lt. Gen. Robert L. Eichelberger, who initially fared no better. However, MacArthur pushed Eichelberger onward, and the enemy force was finally defeated on 22 January 1943 through a grueling battle of attrition.
After the Buna campaign, MacArthur created the Sixth U.S. Army under the command of Lt. Gen. Walter Krueger. Although historians have largely overlooked Krueger's overall role in New Guinea, he coordinated the various services and developed operational plans that made MacArthur's strategy a success.
Krueger's first order was an attack on Saidor in January 1944 as part of an effort to seize the Vitiaz Strait. Next, MacArthur wanted Hansa Bay, but intercepted and decrypted Japanese Army messages (through ULTRA) tipped off SWPA leaders that the Japanese were expecting a landing there. So, he directed Krueger to seize Hollandia in April 1944. Thus began a string of amphibious assaults along the northern coast of New Guinea. Following Hollandia came Wakde and Biak in May 1944, and Noemfoor and Sansapor in July 1944. By the fall of 1944, the Sixth Army had secured New Guinea sufficiently to invade the Philippines.
Both sides invested heavily in the campaign. The Japanese committed 180,000 men, while the Allies employed five Australian divisions and six American divisions. The Americans suffered approximately 16,850 casualties and the Australians over 17,000. The Japanese lost the most, with 123,000 killed.
The New Guinea campaign was important for several reasons. It protected Australia and provided a stepladder for the liberation of the Philippines; it demonstrated the valuable role of Krueger; it illustrated the American strategy of leapfrogging, one that emphasized bypassing Japanese strongholds while capturing less defended areas; and it reflected MacArthur's obsessive desire to return to the Philippines as quickly as possible.
[See also Philippines, Liberation of the; World War II, U.S. Naval Operations in: The Pacific.]
Bibliography
(1942-44) an attack on Port Moresby by the Japanese in an attempt to isolate Australia. The attack began in the summer of 1942, when the Japanese were secure on the island's northern coast, in Buna. The Australians rebuffed that attack, and by January 1943, American forces defeated the Japanese at Buna. Gen. Douglas MacArthur, head of the Southwest Pacific Area, subsequently created the 6th U.S. Army, under the efficient command of Lt. Gen. Walter Krueger, which captured the northern coast by the fall of 1944.
See the Introduction, Abbreviations and Pronunciation for further details.
The New Guinea campaign (1942–1945) was one of the major military campaigns of World War II.[citation needed]
Before the war, the island of New Guinea was split between:
New Guinea was strategically important because it was a major landmass to the immediate north of Australia. Its large land area provided locations for large land, air and naval bases.[citation needed]
Fighting between Allied and Japanese forces commenced with the Japanese assault on Rabaul on 23 January 1942. Rabaul became the forward base for the Japanese campaigns in mainland New Guinea, including the pivotal Kokoda Track campaign of July 1942–January 1943, and the Battle of Buna-Gona. Fighting in some parts of New Guinea continued until the war ended in August 1945.
General Douglas MacArthur as Supreme Commander in the South West Pacific Area, led the Allied forces. MacArthur was based in Melbourne, Brisbane and Manila. The Japanese 8th Area Army, under General Hitoshi Imamura, was responsible for both the New Guinea and Solomon Islands campaigns. Imamura was based at Rabaul. The Japanese 18th Army, under Lieutenant General Hatazō Adachi, was responsible for Japanese operations on mainland New Guinea.
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