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  Some things she did as a ruler:
 Rebuild a military
 Started some education reforms
 Centralize Government
 Reformed tax codes
 Expelled Jews from some of their lands
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  To be the ruler she had to marry someone, and so she did.
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  Her raised to power made the Austria war of Succession (1740-1748)
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  German population decreased 30%, 50% of males died, diseases, femine, and expulsion decreased the population another 30%
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  Peace of Westphalia
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  1/3 of all Germany was destroyed
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  Ferdinand send Catholics nobles to the mostly Protestant city of Prague to say that everyone should turn Catholic.
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  The Protestant responded by tossing the nobles out of the window.
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  Massive death and a "dark age" that cost 30 years of destruction.
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  Charles IV don't have any son, so there is none one to take the throne. Just a girl: Maria Theresa