Russo-Japanese War

The 1904–1905 war between the Russian and Japanese empires over influence in Manchuria and Korea. Japan’s victory led to the Treaty of Portsmouth and reshaped power in East Asia.

Siege of Port Arthur: A prolonged Japanese siege of Russia’s fortified naval base on the Liaodong Peninsula in 1904–1905. Its capture removed Russia’s principal stronghold on the Yellow Sea and became a defining campaign.
First Sino-Japanese War: An 1894–1895 war between China and Japan that ended with Japan’s victory and the Treaty of Shimonoseki. Its settlement intensified competition over Korea and Manchuria.
Russian Revolution of 1905: A wave of strikes, protests, and uprisings that challenged the Russian autocracy in 1905. Military setbacks worsened domestic unrest and helped trigger the revolutionary crisis.
Battle of the Yalu River: A May 1904 land battle in which Japanese forces defeated Russian troops near the Yalu River. It was the first major land battle and opened Japan’s advance into Manchuria.
Battle of Tsushima: A decisive naval battle in May 1905 in which Japan’s fleet destroyed much of Russia’s Baltic Fleet. The defeat sharply weakened Russia’s position and increased pressure to negotiate.
Triple Intervention: A 1895 diplomatic intervention by Russia, France, and Germany that forced Japan to relinquish the Liaodong Peninsula. Japan’s resentment and Russia’s subsequent lease of the peninsula deepened their rivalry.
Korean Empire: The Korean state established in 1897 and brought under Japanese colonial rule in 1910. Japan’s victory accelerated its domination of Korea.
Battle of the Yellow Sea: An August 1904 naval battle between the Russian and Japanese fleets near the Shandong Peninsula. Russia’s fleet failed to break out of Port Arthur, strengthening Japan’s maritime position.
Battle of Mukden: A major land battle fought near Mukden in February and March 1905, ending in a Japanese victory. Its scale and outcome demonstrated Japan’s ability to defeat Russia’s field armies.
Russo-Japanese Convention of 1898: An agreement in which Russia and Japan recognized Korea’s independence while asserting special interests there. Its limited terms failed to settle the countries’ competing influence in Korea.

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