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

arabs–

bulgars–

What political issue distinguished wendell willkie from franklin d. roosevelt?

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

Before the invention of the loom in 1785, textile manufacturing was: a) regulated under the guild system. b) performed by children working in factories. c) produced in rural cottages under a putting-out system. d) conducted by british colonists overseas.