One reason the euphrates, indus, nile, and tigris valleys became centers of early civilization is that these valleys had

the social contract theory

frederick the great and the war of austrian succession. frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. he also declared himself king of bohemia, and maria theresa sent troops to retake bohemia. in august he led 80,000 of these men across the frontier into bohemia, his