Complex sentence: On June 10,1871, the Americans attacked Choji Garrison on Ganghwa, along the Salee River, lightly defended by Koreans, who were armed with severely outdated weapons, such as matchlock rifles.
Split into simpler sentences: On June 10,1871, the Americans attacked Choji Garrison on Ganghwa, along the Salee River, lightly defended by Koreans. Who were armed with severely outdated weapons, such as matchlock rifles.