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.
Battle of Ioribaiwa The Battle of Ioribaiwa took place between 14 and 16 September 1942, during the Kokoda Track campaign of the Second World War. Involving forces from Australia, the United States, and Japan, the fighting centred on a high feature known as Ioribaiwa Ridge, south of Ofi Creek on the Kokoda Track, in the Territory of Papua. It was the last of three defensive battles fought by the Australians along the Kokoda Track to halt the Japanese advance from the north coast of Papua towards Port Moresby.