What challenges did the byzantine empire face from foreign forces?

avars and sassanids–

arabs–

bulgars–

Why was russia drawn into a conflict with germany after ausria-hungary declared war on serbia ?

Did everyone shared in the economic prosperity of the 1920’s

Plz which of the following provisions of the compromise of 1850 was designed to appeal to slave states? a. congress passed a strict fugitive slave law. b. the slave trade was banned in washington dc. c. texas agreed to give away some of its land so that the territory would be available for future states. d. california was admitted to the union as a free state.