First Russo-Japanese War (Alexander the Liberator)

First Russo-Japanese War
Clockwise from top: Russian cruiser Pallada under fire at Port Arthur, Russian cavalry at Mukden, Russian cruiser Varyag and gunboat Korietz at Chemulpo Bay, Japanese dead at Port Arthur, Japanese infantry crossing the Yalu River
Date 8 February 1904 – 5 September 1905 (1 year, 6 months and 4 weeks) Location Manchuria, Yellow Sea, Korean Peninsula Result Japanese victory; Treaty of Portsmouth
Belligerents
Russia Montenegro	Japan
Commanders and leaders
Nicholas II Grand Duke Mikhail Sergei Witte Viktor Chernov Yevgeni Alekseyev Aleksey Kuropatkin Stepan Makarov  † Zinovy Rozhestvensky Wilgelm Vitgeft  † Nicholas I	Emperor Meiji Ōyama Iwao Kodama Gentarō Nogi Maresuke Kuroki Tamemoto Tōgō Heihachirō
Strength
1,365,000 (total) 700,000 (peak)	1,200,000 (total) 650,000 (peak)
Casualties and losses
Total: 43,300–120,000: 34,000–52,623 killed or died of wounds 9,300–18,830 died of disease 146,032 wounded 74,369 captured	Total: 58,000–86,100 47,152–47,400 killed 11,424–11,500 died of wounds 21,802–27,200 died of disease

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.