One who, or that which, backs; especially one who backs an entrant in a contest, or who supports an enterprise by funding it.
An American, especially a soldier or leader who wages war against Islamist militants.
the crusaders of the Middle Ages
A Westerner; a Christian, especially of European descent or a missionary.
A fighter in the medieval Crusades who had taken the Cross.
A person engaged in a crusade.
(either attributively or in the plural) The United States and its Western allies.