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.
Kawaguchi Detachment The Kawaguchi Detachment was an Imperial Japanese Army (IJA) formation that existed during World War II. Under the command of Major General Kiyotake Kawaguchi, the detachment consisted of the IJA's 35th Infantry Brigade and the 124th Infantry Regiment. The detachment operated independently of its parent IJA 18th Division and saw action in several campaigns, including fighting on Borneo, the Philippines and Guadalcanal.