sentences:  Archaeological sites in India, such as Kosambi and Jhusi near Prayagraj in present-day Uttar Pradesh show iron implements in the period 1800–1200 BC.When this area in the North Western part of India was first settled, Prayag was part of the territory of the Kuru tribe, although most of Doab was not settled and consisted of dense forests at that time.The Doab region, including Prayaga, was controlled by several empires and dynasties in the ages to come.