How did the political borders of the world change during the period of Alexander's rule?

During Alexander's expedition, he founded some 20 cities that bore his name, and these cities became centers of culture and diversity. These cities are Egypt's Mediterranean port of Alexandria. Hellenization refers to the spread of Greek language, culture, and population into the former Persian empire after Alexander's conquest.

At the time of his death, Alexander's empire covered some 5,200,000 km2 (2,000,000 sq mi), [203] and was the largest state of its time. Many of these areas remained in Macedonian hands or under Greek influence for the next 200-300 years. The successor states that emerged were, at least initially, dominant forces, and these 300 years are often referred to as the Hellenistic period.