What areas were fought over in the war fought by the Japanese Fourth Army?
Fourth Army (Japan) The Japanese 4th Army (第4軍 , Dai-yon gun ) was an army of the Imperial Japanese Army based in Manchukuo from the Russo-Japanese War until the end of World War II.
Admiralty Islands campaign The Admiralty Islands campaign (Operation Brewer) was a series of battles in the New Guinea campaign of World War II in which the United States Army's 1st Cavalry Division occupied the Japanese-held Admiralty Islands.