Why was Blitzkrieg so effective?

The Blitzkrieg was so effective because it was "designed to create disorganization among enemy forces through the use of mobile forces and locally concentrated firepower" (Website 3). This allowed the Germans to have the upper hand when attacking and often was the reason for their success.

Explanation:

china is shifting toward specialization in industry and services and away from agriculture.

explanation:

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answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;