United States expedition to Korea

Korean Expedition
The captured Sujagi aboard USS Colorado in June 1871
Date 1 June – 3 July 1871 (1 month and 2 days) Location Ganghwa Island 37°42′00″N 126°26′00″E / 37.7000°N 126.4333°E / 37.7000; 126.4333 Result Inconclusive American Tactical Victory Successful punitive expedition and withdrawal Status quo of Korean isolationist policies is retained
Belligerents
United States	Joseon
Commanders and leaders
John Rodgers Winfield Schley Hugh McKee †	Eo Jae-yeon † Eo Jae-sun †
Strength
650 men 1 frigate 2 sloops-of-war 2 gunboats	800 men 40 artillery pieces 6 forts 4 shore batteries
Casualties and losses
3 killed 10 wounded 1 gunboat damaged	243 killed (American estimate)[1] ~350 killed (Korean estimate, likely including drowning victims)[1] 20 captured (later released) 40 artillery pieces captured 5 forts destroyed 1 fort damaged 4 shore batteries destroyed

The United States expedition to Korea, known in Korea as the Shinmiyangyo (Korean: 신미양요; Hanja: 辛未洋擾; lit. Western Disturbance in the Shinmi Year) or simply the Korean Expedition, was an American military action in Korea that took place predominantly on and around Ganghwa Island in 1871.