Harsha Vardhana's empire, 606–647

Timeline

1. 606–612Kannauj · Uttar PradeshHarsha acceded after his brother Rajyavardhana was murdered; he successively conquered Magadha, Kashi and other states, establishing his capital at Kannauj and laying the foundation for northern Indian unification.
2. 613–642Gangetic plain of northern India · IndiaHarsha pursued a policy equally favoring Buddhism and Brahmanism, patronized monasteries and scholarship, and maintained diplomatic relations with the Tang dynasty, Tibet and South Asian states; the empire's territory and prestige reached their peak.
3. 647Kannauj · Uttar PradeshAfter Harsha died without a direct heir, the empire quickly fell into fragmentation among regional lords, and northern India again split into several small states, ending the unified order.