Chandragupta Maurya and Alexander III of Macedon: Imperial Formation, Military Capacity, and a Comparative Strategic Assessment

The late fourth century BCE witnessed the rise of two transformative imperial figures: Alexander III of Macedon and Chandragupta Maurya. While Alexander forged one of the largest transregional empires of the ancient world through rapid military expansion, Chandragupta established the first territorially unified imperial state across the Indian subcontinent. This study undertakes a structured comparative analysis of their military institutions, logistical systems, administrative frameworks, and imperial sustainability. Drawing upon Greco-Roman sources such as Megasthenes, as preserved in Strabo, Arrian, and Diodorus Siculus, alongside Indic traditions and Mauryan administrative models associated with Chanakya, the paper evaluates relative manpower capacity, cavalry strength, elephant corps deployment, command structure, and state-level logistical depth. The Mauryan army is reported in classical sources to have included approximately 600,000 infantry, 30,000 cavalry, 9,000 war elephants, and 8,000 chariots—figures that dramatically exceeded the expeditionary force fielded by Alexander in his eastern campaigns, which at the Hydaspes numbered roughly 40,000–47,000 troops with fewer than 200 war elephants encountered. This study argues that while Alexander's army demonstrated unparalleled tactical mobility and battlefield innovation, the Mauryan state represented a structurally superior imperial formation in terms of demographic base, replenishment capacity, and territorial consolidation. A controlled counterfactual military assessment suggests that while Alexander may have achieved localized tactical successes, prolonged engagement against a fully mobilized Mauryan imperial system would likely have favored Chandragupta's structurally embedded state apparatus.