<span>the middle united states has more rapid changes in temperature than the western united states.</span>
There were many groups because the Empire was located at the crossroads of the continents. That's why its culture was influenced by both western cultures such as the Greek and Roman ones, but also by eastern ones such as Turks, Persians, Arabs, Egyptians, and similar.
Advanced Research Projects Agency Network- a U.S. department of defense (DOD)