Answer: crusaded

AnswerCrossword Clue
CRUSADEDPushed hard (for)
CRUSADEDFought with Richard the Lion-Hearted
CRUSADEDPushed one's cause
crusadedLead or take part in an energetic and organized campaign concerning a social, political, or religious issue
crusadedCRUSADE, to engage in a holy war