The basic administrative unit of the byzantine empire after the seventh century was a military district called the

the government paid religious orders to provide basic education to native american children on reservations. in the late 19th and early 20th centuries, the bureau of indian affairs (bia) founded additional boarding schools based on the assimilation model of the off-reservation carlisle indian industrial school.

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.