A polis of ancient Greece was a a)politically independent unit that included a city and surrounding land. A polis meant the city-states which existed during ancient Greece and would stand today as what it's modern city would be called. A polis also stood as a form of identity as it would be a person's citizenship and can be used to describe a body of citizens.
Answer:
At Valley Forge during the American Revolution, Baron von Steuben, a German officer who helped train American troops, adapted Prussian techniques into a less rigid drill system fitted to the American character and to conditions of warfare in the New World.
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They filled the pipe with cement but air pockets formed and built up pressure that then exaploded the pipe
