Ganghwado Island has been a strategic military defense location for over a millennia. It is located at the mouth of the Imjin and Han Rivers, which pass by the capitals of the Goryeo dynasty (918-1392), Gaeseong, and the Joseon dynasty (1392-1910), Hanyang (present-day Seoul). It was the temporary capital of Goryeo during the Mongol invasions from 1232-1270. The famous Incheon Landing of the Korean War also occurred near here, and today it lies along the border with North Korea.
