Forces thought to be belonging to Gonancho (Second Southern Court), a movement calling for the restoration of the Yoshino Imperial Court (Nancho, the Southern Court), invaded the Imperial Palace, stole some of the Three Sacred Treasures and escaped to Mt. Hiei.
吉野朝廷（南朝）の復興を唱える後南朝とされる勢力が御所に乱入し、三種の神器の一部を奪い比叡山へ逃れた。