The nineteenth monarch of Goguryeo, Broad Expander of Domain, Peacemaker and Supreme King. At the end of 4th century, battles among states and powerful enemies from continent and ocean disintegrated Korean Peninsula. But, Gwanggaeto the Great led Koguryo to a new level of greatness. After the succession, Gwanggaeto the Great, leading his powerful troops, declared war to Paekche in 392, being unstoppable and captured tens of castles, finally, the king of Paekche surrendered to Gwanggaeto the Great and Koguryo claimed the rule over Korean Peninsula once again. But Gwanggaeto the Great was not satisfied with this victory. In 400, with his unstopped army, he expelled Japan army, which was at war with Silla, from Korean Peninsula, and defeated the united army of Japan and Paekche for several times. During his reign, Koguryo became the most powerful country in the history of Korean Peninsula, and Gwanggaeto the Great, the great hero, has been remembered and eulogized. Gwanggaeto monument, set up by his son, still exists with all his great