American whaleships cruised for right whales off the islet between 1849 and 1888. They called it White Rock.[1] Some went ashore to collect bird's eggs.[2]
During the Korean War, the United States Eighth Army used the islet as a base for guerrilla operations off the coast of Wonsan. It served as a headquarters for some operations due to its height, which made it useful for radio frequencies.[3] Suspicious activity from the guerrillas on the islet led the Army to shut down the base in February 1952.[4]
