Japanese forces seized Gyeongbokgung Palace and asserted direct influence over Korea’s government, escalating tensions with Qing China and setting the stage for open war.
Off Pungdo, Japanese and Qing warships fought what is widely treated as the first naval battle of the war, occurring before formal declarations and helping push both empires toward full-scale conflict.
Japanese forces defeated Qing troops near Seonghwan/Asan, undermining Qing efforts to hold southern Korea and strengthening Japan’s operational control on the peninsula.
Both governments issued formal declarations, transforming a rapidly escalating Korea-centered crisis into the First Sino-Japanese War.
Japanese forces captured Pyongyang, forcing Qing troops to retreat northward and shifting the main theater toward the Yalu River frontier.
Japan’s decisive naval victory over the Beiyang Fleet near the Yalu/Yellow Sea helped secure maritime superiority, enabling amphibious movement and sustained operations against Qing coastal positions.
Japanese troops crossed the Yalu and defeated Qing defenses at Jiuliancheng, opening a route into Manchuria and widening the war beyond Korea.
Japanese forces took Lüshunkou (Port Arthur) on the Liaodong Peninsula, a major strategic port whose fall pressured Qing defenses and contributed to the drive toward a negotiated peace.
A combined land-and-sea operation captured Weihaiwei and effectively neutralized remaining Beiyang Fleet assets, sharply reducing Qing leverage and accelerating peace efforts.
Japanese and Qing plenipotentiaries began negotiations at the Shunpanrō in Shimonoseki, initiating the final diplomatic phase that led to the Treaty of Shimonoseki.
The treaty ended the war: Qing China recognized Korean independence, ceded Taiwan and the Pescadores (and initially the Liaodong Peninsula), agreed to a large indemnity, and granted expanded Japanese commercial access.
Russia, France, and Germany intervened diplomatically to oppose Japan’s retention of the Liaodong Peninsula, forcing a revision of the settlement reached at Shimonoseki.
The treaty became effective after ratification procedures, putting its core provisions (including cessions and indemnity obligations) into force.
Following the Triple Intervention, Japan moved to retrocede the Liaodong Peninsula to Qing China, reflecting the limits of Japan’s diplomatic position despite military victory.
First Sino-Japanese War and the Treaty of Shimonoseki (1894-1895)
