In 392, Gwanggaeto led an attack on Baekje with 40,000 troops, capturing 10 walled cities [REF].
In 400, while Gwanggaeto was occupied with Baekje, Gaya, and Wa troops in Silla, the Xianbei state of Later Yan, founded by the Murong clan in present-day Liaoning, attacked Goguryeo [REF].