crusader

noun
cru*sad*er \ krü-ˈsā-dər \
circa 1701
  • one who engages in a crusade: such as
  • a person who participated in any of the military expeditions undertaken by Christian powers in the 11th, 12th, and 13th centuries to win the Holy Land from the Muslims
  • a person who makes an impassioned and sustained effort to bring about social or political change
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