In the late fourth century BC, the Macedonian general and king Cassander abolished all previous settlements in the region in order to unify the region into a single political unit, which became the city of Thessalonica. It was geographically strategically located by the [[Thermaic Gulf]], where lucrative trade routes from the city of [[Byzantium]] and the Danube basin met. Because of its advantages, it immediately replaced [[Pella]] as the most important port of Macedonia, thus leading to massive fortifications being almost immediately built around the city. In 273 BC, it was utilized as a base in order to launch attacks on [[Pyrrhus]], the king of [[Epirus]]. | In the late fourth century BC, the Macedonian general and king Cassander abolished all previous settlements in the region in order to unify the region into a single political unit, which became the city of Thessalonica. It was geographically strategically located by the [[Thermaic Gulf]], where lucrative trade routes from the city of [[Byzantium]] and the Danube basin met. Because of its advantages, it immediately replaced [[Pella]] as the most important port of Macedonia, thus leading to massive fortifications being almost immediately built around the city. In 273 BC, it was utilized as a base in order to launch attacks on [[Pyrrhus]], the king of [[Epirus]]. |