During Darius the Great's reign at the end of the 6th Century BCE.
The Roman empire reached its greatest extent under the reign of Trajan.
No. It was under Trajan that the empire reached its largest size.
From today's Libya to Pakistan in the east.
Persian Wars:Persia's attempt to maintain peace amongst it Greek cities by bringing the rest of the Greek east inside its borders. Persia lost.Peloponnesian War:Athens' over-reach with its empire and Peloponnesian resistance to this. Athens lost its empire.
The Byzantine Empire reached its greatest extent under Justinian I in 555 A.D. When Justinian began his reign, the empire included the Balkans, Asia Minor, the Caucasus, Northern Mesopotamia, Syria, Palestine, and Egypt. Under his generals Belisarius and Narses, Justinian reconquered North Africa, Dalmatia, Italy, Sicily, Sardinia, Corsica, and the southern half of Spain.
The noun extent is from the same root as the verb to extend (to reach, or to reach out). The extent of a reference is how far it extends, is extended, or is extending.
The Eyalet of Egypt, a province within the Ottoman Empire, conquered the Somaliland coast (the area around and including Berbera) in 1548. This was the southernmost point in the Ottoman Empire.
The following sentence should be He is so short, to such an extent that he can't reach to the basin.
In which direction would someone travel from Sidon to reach the Persian gulf?north, south, east or west.
Range, scope, region, or degree is the synonym of extent.
By 117 AD, the Roman Empire has reached its peak. That is true, the roman empire peaked at that time. But later, the eastern roman empire, or byzantine empire, controlled most of the old roman empire plus some territory to the east, but I think that the best response to that question is 117 AD
range, field, area, reach, scope, limit, extent, boundary