Four kingdoms and four empires of the era of the Ancient World?

One of the first powers of antiquity, which began to be called an empire, was Achaemenid Iran. Then it was conquered by another empire – the state of Alexander the Great. After Alexander died and the huge state disintegrated, the Seleucid Empire arose. Another empire of antiquity was also the Roman.

Among the kingdoms of the Ancient World, one can mention Egypt, Assyria, Media and Urartu (arose in the Armenian Highlands and for a long time competed with Assyria). The Assyrian kingdom has been one of the most powerful for several centuries.