Who invaded eastern europe in the 9th century?

Over the ninth and tenth centuries, Europe was invaded from the south by Muslims, from the East by a people called the Magyars, and from the north by the “Northmen” or Vikings. The invasions of the seafaring Vikings lasted the longest, reached the farthest, and caused the most significant changes in Western Europe.

Explanation:

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an outline of all three paragraphsan identification of the historical era that you are writing aboutan explanation of the term mass productiona description of two ways new technology affected industrya conclusion that shows how new technologies allowed industrialization to grow