Alexander the Great After Defeating Persia: 10-Year Asian Campaign

After decisive victories at Granicus (334 BCE), Issus (333 BCE), and Gaugamela (331 BCE) ended Achaemenid Persian rule, Alexander III of Macedon embarked on a 10-year campaign (331–323 BCE) across Central and South Asia, forging the Hellenistic world.

Major Phases

1. Persian Heartland (331–330): Babylon, Susa, Persepolis (burned), Pasargadae. Adopted Persian court dress/proskynesis—alienating Macedonians.
2. Central Asia (329–327): Bactria, Sogdiana (modern Afghanistan, Uzbekistan, Tajikistan). Brutal counterinsurgency vs. Spitamenes. Married Roxana (Bactrian noble).
3. Indian Campaign (326–325): Crossed Hindu Kush → Indus Valley. Battle of Hydaspes vs. Porus. Army mutinied at Hyphasis (Beas River)—refused further east.
4. Return & Consolidation (325–323): Gedrosian Desert march (catastrophic losses). Susa mass weddings (Macedonian officers + Persian noblewomen). Babylon administrative reforms. Died June 323 BCE (fever/poison?).

Legacy

• 30+ cities named Alexandria—cultural diffusion nodes
• Greek language, art, science spread to Indus
• Successor kingdoms (Ptolemaic, Seleucid, Antigonid) ruled 300 years
• Hellenistic synthesis: Greek + Persian + Egyptian + Indian elements

Alexander's conquests reshaped Afro-Eurasian connectivity—enabling Silk Road trade, Buddhist art (Gandhara), and scientific exchange (Alexandria Library).