Events June 25 - The Peace of Constance is signed between Frederick Barbarossa and the Lombard League. Three-year old Emperor Go-Toba ascends to the throne of Japan after the forced abdication of his brother Emperor Antoku during the Genpei War. August 14 — Taira no Munemori and the Taira clan take the young Emperor Antoku and the three sacred treasures and flee to western Japan to escape pursuit by the Minamoto clan (traditional Japanese date: Twenty-fifth Day of the Seventh Month of… (More on 1183)