Russo-Japanese War Begins

Setting the scene

The Russo-Japanese War began on February 8, 1904, when Japan launched a surprise naval attack on the Russian fleet at Port Arthur in Manchuria. The war was fought over rival imperial ambitions in Korea and Manchuria. Russia, seeking a warm-water port in the Pacific, had leased Port Arthur from China in 1898 and built the Trans-Siberian Railway to connect it. Japan, which had modernized rapidly since the Meiji Restoration, saw Russian expansion as a threat to its own ambitions in Korea, which it considered within its sphere of influence.

What happened

Japan's attack on Port Arthur, without a declaration of war, mirrored the later Pearl Harbor attack. The Japanese navy, built with British assistance, blockaded Port Arthur and won decisive naval victories, including the Battle of the Yellow Sea and the Battle of Tsushima in May 1905, where Admiral Togo destroyed the Russian Baltic Fleet that had sailed halfway around the world. On land, Japanese armies won battles at Mukden and Liaoyang, though at heavy cost. The war demonstrated the effectiveness of modern, industrial warfare.

Why it still matters

The war ended with the Treaty of Portsmouth in September 1905, mediated by U.S. President Theodore Roosevelt, who won the Nobel Peace Prize. Japan gained control of Korea, Port Arthur, and the South Manchurian Railway, and recognition as a great power—the first Asian nation to defeat a European power in modern times. Russia's defeat contributed to the 1905 Revolution. The war shocked the world, challenging assumptions of white racial superiority and inspiring anti-colonial movements across Asia. It also set Japan on a path of imperial expansion that would lead to World War II.

Background

An Asian power defeated a European empire on land and sea.