In 1944, with the Japanese position in the Pacific deteriorating rapidly, the IJA mobilized over 500,000 men and launched Operation Ichi-Go, their largest offensive of World War II, to attack the American airbases in China and link up the railway between Manchuria and Vietnam. This brought major cities in Hunan, Henan and Guangxi under Japanese occupation.
Early in the Second World War, John Maynard Keynes of the British Treasury and Harry Dexter White of the United States Treasury Department independently began to develop ideas about the financial order of the postwar world. After negotiation between officials of the United States and United Kingdom, and consultation with some other Allies, a "Joint Statement by Experts on the Establishment of an International Monetary Fund," was published simultaneously in a number of Allied countries on April 21, 1944.
In April, the Allies launched an operation to retake Western New Guinea. The Western New Guinea campaign was a series of actions in the New Guinea campaign, the campaign begun on 22 April 1944. Fighting in western New Guinea continued until the end of the war.