The military history of Bassein encompasses the period from 1526, when the Portuguese established their first factory at Bassein, until 1818, when Bassein lost its strategic importance following the defeat of the Marathas by the British.

Vasai is a historical place and city located in Palghar district; which was partitioned out of the Thana district in 2014. It also forms a part of Vasai-Virar twin cities in the Konkan division, Maharashtra, India, and comes under the Police Jurisdiction of Mira-Bhayander, Vasai-Virar Police Commissionerate.