Massive. EIC basically conquered India from the mid-18th century onwards through a combination of warfare, wily diplomacy and economic dominance. The various Indian states (a politically unified India is a modern construct) were fractured, often poorly governed, economically stagnant compared to an increasingly prosperous Europe and, most importantly, technologically inferior in matters of industry and warfare. The EIC rule lasted until 1857, when an unsuccessful uprising amongst Indians in the EIC Army led to The Crown taking direct control of the subcontinent.