What areas were fought over in the war fought by the Japanese Fourth Army?
Russo-Japanese War The Russo–Japanese War (Russian: Русско-японская война , "Russko-yaponskaya voina"; Japanese: 日露戦争 "Nichirosensō"; 1904–05) was fought between the Russian Empire and the Empire of Japan over rival imperial ambitions in Manchuria and Korea. The major theatres of operations were the Liaodong Peninsula and Mukden in Southern Manchuria and the seas around Korea, Japan and the Yellow Sea.
Aoba Detachment (Imperial Japanese Army) Aoba Detachment was the reinforced 4th Infantry Regiment/IJA 2nd Division, a part of the Seventeenth Army. The commander of the Aoba Detachment was Major General Yumio Nasu, the commander of the 2nd Division's Infantry Group. Unlike other detachments which were usually named after their commander, the Aoba Detachment is thought to have been named after Mt. Aoba in Sendai, hometown of the 4th Infantry Regiment.