What were some of the factors that allowed the black death to spread so quickly and with such deadly results?

What was a result of the industrial revolution in the united states

During wwi, literacy tests were used to control immigration, which marked a return of what type of ideology in some americans?

The military dictatorship inviolently reacted to the opposition of the maya, who demanded greater rights for their native population. the genocide inresulted from a struggle between arab nomadic tribes and non-arab agricultural groups. the tutsi were the victims of genocide inat the hands of the hutu rulers.