Pacific War - Participants

Participants

The Axis states which assisted Japan included the authoritarian government of Thailand, which quickly formed a temporary alliance with the Japanese in 1941, since Japanese forces were invading the southern peninsula of Thailand, anyway. Also the Phayap Army sent troops to invade and occupy northeastern Burma. This was former Thai territory that had much earlier been forcibly taken away by the British Army. Also involved were the Japanese puppet states of Manchukuo and Mengjiang (consisting of most of Manchuria and parts of Inner Mongolia respectively), and the collaborationist Wang Jingwei regime (which controlled the coastal regions of China).

The official policy of the U.S. Government is that Thailand was not an ally of the Axis, and that the United States was not at war with Thailand. The policy of the U.S. Government ever since 1945 has been to treat Thailand not as a former enemy, but rather as a country which had been forced into certain actions by Japanese blackmail, before being occupied by Japanese troops. Thailand has been treated by the United States in the same way as such other Axis-occupied countries as Belgium, Czechoslovakia, Denmark, Greece, Korea, Norway, Poland, and the Netherlands.

Japan enlisted many soldiers from its colonies of Korea and Formosa (Taiwan). To a small extent, some Vichy French, Indian National Army, and Burmese National Army forces were active in the area of the Pacific War. Collaborationist units from Philippines, Dutch East Indies, British Malaya, Inner Mongolia and former French Indochina (after the overthrow of Vichy French regime) as well as Timorese militia also assisted Japanese war efforts.

The major Allied participants were the United States, the Republic of China, the United Kingdom (including the armed forces of British India, the Fiji Islands, Samoa, etc.), Australia, the Commonwealth of the Philippines, the Netherlands (as the possessor of the Dutch East Indies and the western part of New Guinea), New Zealand, and Canada, all of whom were members of the Pacific War Council. Mexico, Free France and many other countries also took part, especially forces from other British colonies and also Latin America.

The Soviet Union fought two short, undeclared border conflicts with Japan in 1938 and 1939, then remained neutral until August 1945, when it joined the Allies and invaded the territory of Manchukuo, Republic of China, Inner Mongolia, the Japanese protectorate of Korea and Japanese-claimed islands such as Sakhalin coordinated notably between the Red Banner Pacific Fleet and the US Navy's Task Force 38.