Which Cyrus the great belong to the Han civilization or the Gupta or the Aztec or the Inca or the Mayan

Cyrus was born between 590 and 580 BCE, either in Media or, more probably, in Persis, the modern Fārs province of Iran. The meaning of his name is in dispute, for it is not known whether it was a personal name or a throne name given to him when he became a ruler. It is noteworthy that after the Achaemenian empire the name does not appear again in sources relating to Iran, which may indicate some special sense of the name.

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.

during both period congress passed law restricting the civil liberties of american citizen that meet with the overall public support is the one statement that explain the rate scare of the 1920 and 1950 is very similar