The history of Bengal for two and a half thousand years or earlier refers to the history of the northern region and North Bengal. Because, the Gangetic delta region was a swampy and island region. Gangaridi therefore does not refer only to the delta. In this book, we have discussed the ancient history of North Bengal besides identifying the Gangaridis that we find in the writings of Greek and Roman writers about the large forces of the Prasae and Gangaridis that stopped Alexander's army. Along with that came the task of identifying 'Sandracottas'. Who was the emperor of North India during Seleucus? Is he Chandragupta Maurya? Or his descendants? The primary kingdom of Srigupta, the founder of the Gupta Empire, was in North Bengal. The Pala Empire also started in North Bengal. A large part of Kamrup was associated with the history of North Bengal. The entire history of North Bengal including many ancient archaeological sites is highlighted in this book. Mahasthangarh, Bangarh, Paharpur, Gosanimari and even British era goddess Chaudhurani is mentioned here?