In the 6th Century BC, North-Western India was invaded by the Achaemenid Empire. The Persians invasion began with Cyrus the Great, and the Persian rule over the North-West lasted up to the 4th Century BC. The Indian subjects of the Achaemenid Empire took part in the Greco-Persian War. The Armies of Darius I and Xerxes had an Indian contingent. In this video, I talk about the history of the Persian invasion and the Persian rule over some parts of Indian, which lasted from the 6th Century BC to the 4th Century BC.

Reference:-
1. A History of Ancient and Early Medieval India: From the Stone Age to the 12th Century by Upinder Singh.
2. History and culture of the Indian people; Vol.II, The Age of Imperial Unity.
3. Gem in the Lotus: The Seeding of Indian Civilisation by Abraham Eraly.
4. Political History of Ancient India. From the Accession of Parikshit to the Extinction of the Gupta Dynasty by Hemchandra Raychaudhuri

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