Emperor Trajan is a great one
Georgia was settled for people with large debts and good climate. It was mainly used as a prison of sorts for the first settlers.
The answer should be:
Animal & human power were generally replaced with steam power.
Answer:
because persia was a larger empire and was probably better but Athens and Sparta and some other Greek city-states helped and they had the advantage because they knew the geography of the land and the element of surprise.