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.
Beiping–Hankou Railway Operation The Japanese 京漢線作戦 or Beiping–Hankou Railway Operation (Mid August – Dec. 1937) was a follow up to the Battle of Beiping–Tianjin of the Japanese army in North China at the beginning of the 2nd Sino-Japanese War, fought simultaneously with Tianjin–Pukou Railway Operation. The Beiping–Hankou Railway Operation was not authorized by the Imperial General Headquarters. The Japanese advanced to the south along the Beiping–Hankou Railway until the Yellow River, capturing Linfen along the way. After the Imperial General Headquarters have wrestled control over troops from local commanders, the majority of participating Japanese units were transferred to participate in the concurrent Battle of Taiyuan. These units were replaced by newly formed 108th and 109th divisions.