- Conflict over Manchuria and Korea
- Preceded by the First Sino-Japanese War (1894-1895)
- Russia rejected Japan's influence over Korea
- Japan attacked Port Arthur in 1904
- Combat on the Liaodong Peninsula and Mukden
- Naval combat in Yellow Sea and Sea of Japan
- Ended with the Treaty of Portsmouth in 1905
- Japan gains Port Arthur, Dalniy, southern Sakhalin and South Manchuria Railway