. "1turtle ship" . "Joseon" . "1schooner" . "Korean victory" . "Land:" . "1 schooner sunk" . . "The General Sherman incident was the destruction of an armed merchant marine side-wheel steamer that visited Korea in 1866. It was an important catalyst to the end of Korean isolationism in the 19th century. After passing the Keupsa Gate without permission from the Koreans, the United States merchant ship was attacked and fought over for several days before finally being destroyed in Pyongyang."@en . "General Sherman incident"@en . "20 killed," . . . . "unknown land forces" . . "1866-07-24Z"^^ . . "Sea:" . .