What is greek polis ?

Polis is a term that is used to describe a tight-knit, small community of ancient Greek citizens who agreed on certain rules and customs. Usually, the poleis (the plural of polis) were centered on a small town and the countryside that surrounded it.

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answer: what was the us involvement in ww1? although the u.s. tried to remain neutral when ww1 broke out, it finally joined on april 6, 1917 after declaring war on germany. the reason for america to become involved in ww1 was germany's unrestricted submarine warfare, which had already sunk several american merchant ships.

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equal area projections

equal-area projection. a projection in which regions on the earth's surface that are of equal area are represented as equal.