Battle of Tsushima

The Battle of Tsushima was the final and decisive naval engagement of the Russo-Japanese War (1904–1905), fought on 27–28 May 1905 in the Tsushima Strait east of Tsushima Island. The Russian Second Pacific Squadron (the Baltic Fleet), commanded by Admiral Zinovy Rozhestvensky, had undertaken an epic seven-month, 18,000-nautical-mile voyage from the Baltic Sea only to be intercepted and annihilated by the Japanese Combined Fleet under Admiral Tōgō Heihachirō. Russia lost all eleven of its battleships (seven sunk, four captured), with over 5,000 dead and 6,000 taken prisoner; Japanese losses amounted to three torpedo boats and roughly 700 casualties.

The battle was the last great fleet action fought between pre-dreadnought battleships and the first in which wireless telegraphy played a decisive role. The Japanese enjoyed overwhelming advantages in speed, centralised fire-control direction, and high-explosive shells filled with Shimose powder (picric acid), while British intelligence and logistical support compounded the Russian disadvantage. The catastrophe forced Russia to sue for peace, resulting in the Treaty of Portsmouth (September 1905), under which Russia ceded the southern half of Sakhalin Island and the Liaodong Peninsula lease to Japan and recognised Japan's dominance over Korea.

The defeat dealt a fatal blow to the prestige of the Romanov dynasty: it exposed the military incompetence of the Tsarist regime and directly precipitated the mutiny on the battleship Potemkin (June 1905) and the broader 1905 Russian Revolution. Conversely, Japan's victory, the first modern defeat of a European power by an Asian nation, inspired anti-colonial leaders from Gandhi to Sun Yat-sen, while also accelerating Japan's own militarist imperialism toward the disasters of the Pacific War.