There are military garrisons positioned all around Ganghwa Island, but the ones along this strait got the most historical action because this waterway was the gateway to Seoul (called Hanyang at the time). Gapgot Heights protected the island going back all the way to the Mongol invasion of the 1200s. This one is yet further up the Yeomha Strait from Choji-jin, Deokjin-jin and Gwangseongbo which we visited earlier in the day.
