Russo-Japanese War Timeline

General Kuroki Tamemoto's First Army crossed the Yalu River and defeated Russian forces under General Zasulich in the war's first major land battle. The victory secured a foothold in Manchuria and shocked international observers who had expected an easy Russian triumph.

Image source: Battle of the Yalu River (1904)

General Nogi Maresuke's Third Army besieged the heavily fortified Russian naval base at Port Arthur. The siege featured brutal trench warfare, massive artillery bombardments, and costly assaults on fortified hills such as 203 Meter Hill before the garrison surrendered after nearly five months.

Image source: Siege of Port Arthur

One of the largest land battles in history up to that time, involving over 250,000 combatants, saw General Kuropatkin's Russian forces repel repeated Japanese assaults around Liaoyang. Although tactically successful, Kuropatkin withdrew northward to avoid encirclement, ceding the city to Japan.

Image source: Battle of Liaoyang

Kuropatkin attempted a counteroffensive south of Mukden with superior numbers but was checked by Japanese forces under Ōyama Iwao. Both sides suffered roughly 40,000 casualties, and the front settled into entrenched stalemate positions south of Mukden for the winter.

Image source: Battle of Shaho

Russian General Stessel surrendered Port Arthur to General Nogi after the capture of 203 Meter Hill gave Japanese artillery command of the harbor. Roughly 31,000 Russian soldiers became prisoners of war, and Japan gained enormous prestige, though Nogi lost two sons in the fighting.

In one of the few Russian offensive actions of the war, General Gripenberg attacked the Japanese Second Army near Sandepu in harsh winter conditions. Poor coordination and Kuropatkin's reluctance to commit reserves forced a withdrawal, ending the last significant Russian counterattack.

Image source: Battle of Sandepu

The largest land battle prior to World War I involved over 600,000 soldiers along a front stretching dozens of miles. Marshal Ōyama's flanking maneuvers routed Kuropatkin's army, which retreated north in good order but abandoned Mukden. Casualties exceeded 100,000 across both armies.

Image source: Battle of Mukden

With peace negotiations looming, Japan invaded Russian-held Sakhalin Island to strengthen its bargaining position. The poorly defended Russian garrison quickly capitulated, giving Japan control of the island that would be partitioned in the eventual peace settlement.

Image source: Japanese invasion of Sakhalin

Japan's defeat of a major European power stunned the world and inspired anti-colonial movements across Asia and Africa. Military observers noted the lethality of modern industrial warfare—machine guns, trenches, and heavy artillery—lessons later borne out in World War I.

Image source: Russo-Japanese War

Military defeats and economic hardship sparked widespread strikes, mutinies, and unrest across the Russian Empire, beginning with Bloody Sunday in St. Petersburg. The domestic crisis pressured Tsar Nicholas II to seek peace with Japan and grant limited constitutional reforms.

Image source: Russian Revolution of 1905

With both empires exhausted, U.S. President Theodore Roosevelt offered to broker peace negotiations. Japan, facing financial strain, accepted, and Russia, weakened by revolution, eventually agreed, leading to talks hosted at Portsmouth, New Hampshire.

Image source: Theodore Roosevelt

Signed at the Portsmouth Naval Shipyard, the treaty ended the Russo-Japanese War. Russia recognized Japanese primacy in Korea, ceded southern Sakhalin, transferred lease rights to Port Arthur and the South Manchuria Railway, and withdrew from Manchuria. Roosevelt won the Nobel Peace Prize for his mediation.

Image source: Treaty of Portsmouth

Many Japanese felt the treaty terms were too lenient toward Russia given their sacrifices, lacking an indemnity. Riots erupted in Tokyo outside a rally at Hibiya Park, with crowds attacking government buildings and police stations, resulting in deaths and hundreds of injuries.

Image source: Hibiya incendiary incident

Leveraging its victory and international recognition of its primacy in Korea, Japan forced the Eulsa Treaty upon Korea, making it a protectorate under a Japanese Resident-General. This paved the way for full annexation of Korea in 1910.

Image source: Japan–Korea Treaty of 1905

The United States and Japan affirmed the Open Door policy in China and each other's Pacific possessions, tacitly acknowledging Japan's gains from the war. The agreement temporarily stabilized relations between the two rising Pacific powers.

Image source: Root–Takahira Agreement

Five years after the war, Japan formally annexed Korea via the Japan–Korea Annexation Treaty, consolidating the strategic gains won in the conflict with Russia. Korea remained under Japanese colonial rule until the end of World War II in 1945.

Image source: Japan–Korea Treaty of 1910