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When the Roman capital moved to Contantinople, Constantinople became a cultural, economical, religious, and administrative center.
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Many invasions from other countries weakened the Roman Empire
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Justinian created a set of laws called the Justinian Code
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Arab people spread the religion throughout the Middle East
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Moslem army was looking for land, so it fought in a big war against Western Europe
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Separation between Eastern Christian Churches and Western Churches
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Began with the invasion of England by William the Conqueror in 28 September 1066
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The battle was between Byzantine Empire and Seljuk Turkish in 1071
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The First Crusade was to recapture Jerusalem..
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The Mongols destroyed Baghdad. They wanted the city to surrender
