The byzantine emperors used what to differentiate among their subordinates

churchill warned that the soviet union had cut eastern europe off from the west with an "iron curtain."

give me brainliest

1. it was caused by feudalism

2. charlemagne used christianity as a major cornerstone for his rule. cloisters were built all over the empire to act as centers for the (re)population of the vast european wilderness.

3. the europeans feared the next raid every time chetak

i'm not so sure about #6. but i hope i you with the first 3.