The Roman Empire
The Roman Empire emerged as a consequence of the expansion of Rome around the Mediterranean Sea. Its maximum range took place during the reign of Emperor Trajan (98-117 AD), when its limits were extended from the Atlantic Ocean in the west, to the shores of the Caspian Sea, the Red Sea and the Persian Gulf, in the east, and from the lands of the Sahara, in the south, to the banks of the rivers Rhine and Danube and the border with Caledonia (South Scotland) in the north.
In the Republican era, he came across a tough competitor in his expansionist zeal, Carthago. The Punic Wars forced Rome to leave the Italian Peninsula, acquiring new lands, which he had to administer, such as Sicily, Sardinia, Corsica or Hispania.