The Battle of Plassey was a decisive victory of the British East India Company, under the leadership of Robert Clive, over the Nawab of Bengal and his French allies on 23 June 1757. The victory was made possible by the betrayal of Mir Jafar, Nawab Siraj-ud-Daulah's commander in chief, as well as much of the Bengal Subah's armies being earlier committed against an Afghan invasion led by Ahmad Shah Durrani against the Mughal Empire. The battle helped the British East India Company take complete control of Bengal in 1773. Over the next hundred years, they continued to expand their control over vast territories in the rest of the Indian subcontinent and Burma.