Who was responsible for bringing slaves from africa to louisiana territory in the lates 1700's

What led to the environmental damage that caused the dust bowl? 1. desert winds emerging from the southwest 2. rotating crops every year and having fallow land 3.overplanting throughout the great plains 4.a year-long drought

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

Which scenario best illustrates the principle of popular sovereignty?