The regiment was renamed the 1st Bengal European Regiment, on formation of the 2nd and 3rd Bengal European Regiments, in 1765. With its ruling status in Bengal confirmed, the East India Company began to expand its influence into neighbouring regions and the regiment went to take part in an action at Rohilkhand in April 1774 during the First Rohilla War. It fought at the Battle of Sholinghur in September 1781 during the Second Anglo-Mysore War and at skirmishes around Gujarat in 1782 during the First Anglo-Maratha War. After that it took part in an action at Rohilkhand in October 1794 during the Second Rohilla War.