crusade

crusade (http://definr.com/crusade)

     n 1: a series of actions advancing a principle or tending toward
          a particular end; "he supported populist campaigns";
          "they worked in the cause of world peace"; "the team was
          ready for a drive toward the pennant"; "the movement to
          end slavery"; "contributed to the war effort" [syn: campaign,
           cause, drive, movement, effort]
     2: any of the more or less continuous military expeditions in
        the 11-13th centuries when Christian powers of Europe
        tried to recapture the Holy Land from the Muslims [syn: Crusade]
     v 1: exert oneself continuously, vigorously, or obtrusively to
          gain an end or engage in a crusade for a certain cause
          or person; be an advocate for; "The liberal party pushed
          for reforms"; "She is crusading for women's rights";
          "The Dean is pushing for his favorite candidate" [syn: fight,
           press, campaign, push, agitate]
     2: go on a crusade; fight a holy war