What was the relationship between the Czech Republic and Poland with the Holy Roman Empire?

The Holy Roman Empire spent a long time expanding eastward to the Czech Republic, the Baltic States, Prussia, Poland and Hungary. The Czech Republic fell under the stronger influence of Germany, which, due to the elective monarchy, began to be ruled by foreign kings. Then the Czech Republic completely became part of Austria as a union. Poland remained independent, stopping the expansion of the Teutonic Order, and thereby the advance of the Holy Roman Empire to the east.



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