Over the 1750s and 1760s, the East India Company became the principal ruler of Bengal. This rise to power was initially achieved by a limited use of military force combined with the clever manipulation of local politics and discontent in Bengal court circles provoked by the young and incautious Nawab Siraj-ud-daula. The Nawaby's army was defeated at Plassey after his most important generals conspired with the British against him. The British concluded a very advantageous treaty with his successor, Mir Jafar, who became increasingly dependent on their goodwill.