The Russo–Japanese War (1904–05) was an armed conflict between the Russian Empire and the Empire of Japan over rival imperial ambitions in Manchuria (China)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. Contents: Causes of the War The First Blow The Korean Campaign Naval Operations Sinking of the "Petropavlovsk" Battle of the Yalu Cutting off Port Arthur The Assault that Failed Battle of Liaoyang Naval Battle off Port Arthur Battle of the Sha-ho The North Sea Outrage Surrender of Port Arthur The First Year of the War After Port Arthur In Winter Quarters The Battle of Mukden Retreat towards Harbin The Battle of the Japan Sea The Treaty of Peace