|Japanese Expansion War|
|Part of World War II|
|Japan||Republic of China|
The war finds its origins in the Sino-Japanese war, with the war between Japan and the Republic of China still going on. Citing territorial expansion, Japan declared war upon Australia, upon which the United Kingdom started to send aid to Australia against Japan.
Japan recently pushed on to the Australian city of Sydney, where Australian forces are preparing for the Japanese assault, while Chinese forces are all the more pushing back the Japanese forces out of China.
In the second week of July, 1939, the US began their campaign in the Pacific, by sending two fleets accompanied by four aircraft carriers, with a total of two million troops expected to be deployed in the Pacific.