The Battle of Plassey was a decisive victory of the British East India Company over the Nawab of Bengal and his French allies on 23 June 1757, under the leadership of Robert Clive. The victory was made possible by the defection of Mir Jafar, who was Nawab Siraj-ud-Daulah's commander in chief. The battle helped the British East India Company take control of Bengal. Over the next hundred years, they seized control of most of the rest of the Indian subcontinent, including Burma.