Key Facts
- Duration
- 19 months (Feb 1904 – Sep 1905)
- Total casualties
- ~250,000
- Baltic Fleet voyage
- 18,000 nautical miles over 7+ months
- Treaty mediator
- US President Theodore Roosevelt
- Territorial transfer
- Southern Sakhalin and Liaodong lease to Japan
Strategic Narrative Overview
Japan opened the war with a surprise attack on Russia's Pacific Fleet at Port Arthur in February 1904. Japanese forces crossed into Manchuria, besieged and captured Port Arthur by January 1905, and seized Mukden in March after fierce fighting. The decisive blow came in May 1905 when the Japanese Combined Fleet annihilated the Russian Baltic Fleet — after its 18,000-nautical-mile voyage — at the Battle of Tsushima, leaving Russia without a viable naval force in the region.
01 / The Origins
Russia's decades-long eastward expansion into Siberia and the Far East brought it into direct rivalry with Japan over Manchuria and Korea. After Russia acquired a lease on the Liaodong Peninsula and Port Arthur from China in 1898 and rejected Japanese offers to divide their respective spheres of influence, Japan — backed by the 1902 Anglo-Japanese Alliance — concluded that war was necessary to secure its position on the Asian mainland.
03 / The Outcome
The war ended with the Treaty of Portsmouth on 5 September 1905, brokered by US President Theodore Roosevelt. Japan gained Russia's lease on the Liaodong Peninsula, the South Manchuria Railway, and the southern half of Sakhalin. Russia's humiliating defeat eroded imperial prestige, fuelled massive domestic unrest, and catalysed the 1905 Russian Revolution, forcing the tsar to grant constitutional concessions. Japan emerged as a recognised great power.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Marquis Ōyama Iwao, Admiral Tōgō Heihachirō, General Nogi Maresuke.
Side B
1 belligerent
General Aleksei Kuropatkin, Admiral Zinovy Rozhestvensky.
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.