The third Nawab Sarfaraz Khan was preoccupied with military engagements, including Nader Shah's invasion of India. Sarfaraz Khan was killed at the Battle of Giria by his deputy Alivardi Khan. The coup by Alivardi Khan led to the creation of a new dynasty. Nawab Alivardi Khan endured brutal raids by the Maratha Empire. The Marathas undertook six expeditions in Bengal from 1741–1748. The Maratha general Raghunath Rao conquered large parts of Orissa. Nawab Alivardi Khan made peace with Raghunathrao in 1751, ceding large parts of Orissa up to the river Subarnarekha. The Marathas demanded an annual tribute payment. The Marathas also promised to never to cross the boundary of the Nawab's territory. European trading companies also grew more influential in Bengal.