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Answer:
During the crusade, Frederick I, Holy Roman Emperor, had almost besieged Constantinople because of the failure of the Byzantines to provide him with safe passage across the Dardanelles. The Byzantines for their part suspected him of conspiring with the breakaway Byzantine provinces of Serbia and Bulgaria.
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gold ,silver and coper im pretty sure
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Answer:
i think its water and steam power and i dont even know WHY.
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