The first through to the fourth crusades involved the Byzantine empire, Muslim states and western Europe in a series of conflict over southeast Asia.
The Crusades were a series of wars and conflict orchestrated by the latin church during the medieval period.
The most important of these Crusades was to retrieve the city of Jerusalem from islamic rule.
The Crusades covered most of the Byzantine empire, and the Muslim world.
During the crusades, four states were established they include
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