Macedonian Empire (Alexander)

The Macedonian Empire of Alexander the Great was one of the largest empires of the ancient world, assembled in little more than a decade through a campaign of extraordinary military success.

Its foundations were laid by Philip II of Macedon, who reformed the army around the pike-bearing phalanx and combined-arms tactics and brought the Greek city-states under Macedonian hegemony. On Philip's assassination in 336 BCE his son Alexander inherited the throne and the project of invading the Persian Achaemenid Empire. Beginning in 334 BCE, Alexander led his army across Anatolia, defeating Persian forces at the Granicus, Issus, and decisively at Gaugamela in 331 BCE, toppling the realm of Darius III. He took Egypt, where he founded Alexandria, and pressed eastward through Central Asia and into the Indus Valley, never losing a major battle. Alexander's conquests spread Greek language, culture, and institutions across the Near East, inaugurating the Hellenistic age in which Greek and local traditions fused in art, science, religion, and urban life. He founded numerous cities and promoted a fusion of Macedonian and Persian elites, though his adoption of Persian court customs caused friction among his followers. The empire's unity depended almost entirely on Alexander himself. When he died suddenly at Babylon in 323 BCE, aged just 32, with no viable heir, his generals (the Diadochi) fell into decades of warfare over the succession. The empire fragmented into rival Hellenistic kingdoms, principally the Seleucid, Ptolemaic, and Antigonid states. Though politically ephemeral, Alexander's empire reshaped the cultural map of the ancient world and his legend influenced rulers for centuries.

Key figures