 In Emperor Henry IV's conflicts with the imperial princes and the struggle against the reform papacy during the Investiture Controversy, young Henry V allied himself with the opponents of his father.He forced Henry IV to abdicate on 31 December 1105 and ruled for five years in compliance with the imperial princes.He tried, unsuccessfully, to withdraw the regalia from the bishops and in order to at least preserve the previous right to invest he captured Pope Paschal II and forced him to perform his imperial coronation in 1111.