A polis was the typical structure of a community in the ancient Greek world. A polis consisted of an urban centre, often fortified and with a sacred centre built on a natural acropolis or harbour, which controlled a surrounding territory of land.
Continental System, in the Napoleonic wars, the blockade designed by Napoleon to paralyze Great Britain through the destruction of British commerce. The decrees of Berlin (November 21, 1806) and Milan (December 17, 1807) proclaimed a blockade: neutrals and French allies were not to trade with the British.
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