Answer
In the Battle of Ishibashiyama, Minamoto no Yoritomo suffered a crushing defeat at the hands of the Taira clan in 1180. Despite being outnumbered and outmatched, Yoritomo managed to escape with his life, marking a significant turning point in the Genpei War. Yoritomo regrouped and eventually emerged victorious, establishing the Kamakura shogunate and ushering in a new era in Japanese history.