On this day, 125 years ago, on June 17, 1900 (May 21, 1900, the Eight-Power Allied Forces captured Dagu Fort. On June 17, 1900, Seymour, Commander-in-Chief of the Eight-Power Allied Forces, captured Tianjin Dagu Fort. Dagu is the gateway to Tianjin, bordering the Bohai Sea in the east and the Jingshan Railway in the north. Its location is extremely important. On June 15, 300 Japanese troops occupied Tanggu Railway Station, and 250 Russian and French troops occupied Junliangcheng Railway Station. On the 16th, 935 navies from Britain, Japan, Russia, Germany and other countries launched a sneak attack and landed and ambushed behind the fort. Ten gunboats from Dagu Pass drove into the Haihe River, and 28 warships drove out of the firepower range of the fort and anchored. At 8 p.m., the coalition forces issued an ultimatum to Luo Rongguang, the commander of the garrison, to hand over the fort at 2 a.m. the next day. Luo Rongguang flatly refused. At 2 a.m. on June 17, more than 10 coalition ships bombarded Dagu Fort with artillery under the illumination of searchlights. The Qing army guarding Taiwan returned fire and destroyed 5 enemy ships. At dawn, the coalition forces bombarded the Qing army's defense with artillery and hit the Zuoying ammunition depot. Guan Tiofang was defeated and killed, and the two fortresses on the north bank were occupied. The coalition fleet concentrated its firepower on bombarding the South Bank Battery, and the landing coalition forces copied from the rear. At 7 a.m., the ammunition depot of the South Fort was destroyed by artillery. At nine o'clock, the Qing army guarding Taiwan retreated in the direction of Xincheng. All Dagu Fort fell. In this battle, the Qing army destroyed 6 enemy ships, killed and injured 255 allied troops, and the Japanese Navy commander was killed. More than 700 Qing soldiers guarding Taiwan were killed, and the Beiyang Navy's largest cruiser "Hairong" and four torpedo boats were captured by the coalition forces. The Qing army on the Dagukou Battery relied on danger to fight against the large swarm of warships of the Eight-Power Allied Forces