Crusader

n. one who fights in a crusade, one who joins a medieval military expedition to recover the Holy Land from the Muslims; one who campaigns for the advancement of a cause

This article is about the medieval crusades. For other uses, see Crusade (disambiguation) and . The Crusades were a series of military conflicts of a religious character waged by much of Christian Europe during 1095–1291, most of which were sanctioned by the Pope in the name of Christendom. The Crusades originally had the goal of recapturing Jerusalem and the sacred "Holy Land" from Muslim rule and were originally launched in response to a call from the Eastern Orthodox Byzantine Empire for help against the expansion of the Muslim Seljuk Turks into Anatolia.
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Noun
1. a disputant who advocates reform
(synonym) reformer, reformist, meliorist
(hypernym) disputant, controversialist, eristic
(hyponym) abolitionist, emancipationist
(derivation) crusade, fight, press, campaign, push, agitate
2. a warrior who engages in a holy war; "the crusaders tried to recapture the Holy Land from the Muslims"
(hypernym) warrior
(derivation) crusade

(n.)
One engaged in a crusade; as, the crusaders of the Middle Ages.
  

A knight on crusade . By going on crusade and undertaking a pilgrimage to the Holy Lands , a knight could gain great credit towards his eventual redemption. Knights who had been on crusade were entitled to be depicted in the funerary effigies, or gisants, with their feet crossed, while those who had not been on crusade were not so entitled. A crusader earned great honor by his efforts; many great knights went on crusade to earn renown, such as William the Marshal or Godfrey de Bouillon.