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  Pope Urban 2 declare the crusades, who will bring control to the Holy Land
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  personal bond between lord and vassal, but with time and the transformation of fiefs into hereditary holdings, the nature of the system came to be seen as a form of politics of land
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  obligations to one lord are regarder as superior
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  beginning of the Reinnassance
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  reinnassance is the rebirth of learning
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  9 crusades passed since 1094 until here, they learned about technology because of navigation
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  crusades,nobles became weaker, black death
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  Martin Luther created the catholic church reform his followers were called protestants
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  wars between the catholic and protestant church
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  Gutemberg invented the printing press
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  military hierarchy in which a ruler or lord offers mounted fighters
