World War Visuals on Instagram: "The Russo-Japanese War definition was a military conflict between Russia and Japan between 1904 and 1905. This war started with a Japanese surprise attack on the Russian Pacific Fleet. The main cause of the war was the conflict between Russia and Japan over the control of Manchuria and Korea. Key victories included the Battle of Mukden and the naval annihilation at the Battle of Tsushima, significantly impacting both nations by boosting Japanese militarism and sp