Crusade

Any one of the military expeditions undertaken by Christian powers, in the 11th, 12th, and 13th centuries, for the recovery of the Holy Land from the Mohammedans.

Any enterprise undertaken with zeal and enthusiasm; as, a crusade against intemperance.

A Portuguese coin. See Crusado.

To engage in a crusade; to attack in a zealous or hot-headed manner.

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"