Gwanggaeto the Great
During his reign, Goguryeo forces under Gwanggaeto the Great of Goguryeo steadily pushed into Baekje from the north. Asin appointed his maternal uncle Jin Mu as chief general and ordered him to attack Goguryeo repeatedly in the early 390s, but each attack was defeated. In 395, after a failed attack by Baekje, Goguryeo took Baekje's territory around today's northern Seoul.