What challenges did the byzantine empire face from foreign forces?
slavs and avars–
avars and sassanids–
arabs–
bulgars–

all choices are correct

i think it was because of how protected egyptian civilization was was which allowed them to evolve without much outside influence.

in 1859, brown and 21 of his followers attacked and occupied the federal arsenal in harper's ferry. their goal was to capture supplies and use them to arm a slave rebellion. brown was captured during the raid and later hanged, but not before becoming an anti-slavery icon. abolitionist and insurrectionist

explanation:

continental currency was denominated in dollars from $​1⁄6 to $80, including many odd denominations in between.