What was the period of Greek and Roman civilization known as?

Byzantine Empire

Explanation:

that's what I think the answer is

frederick the great and the war of austrian succession. frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. he also declared himself king of bohemia, and maria theresa sent troops to retake bohemia. in august he led 80,000 of these men across the frontier into bohemia, his

i might not be much but i think its c