The misuse of trade privileges by EIC officials maddens Siraj(Nawab of Bengal). The continuing misconduct by EIC against Siraj-Ud-Daulah led to the battle of Plassey in 1757. BATTLE OF PLASSEY is a battle fought between the East India Company force and the Nawab of Bengal . It is called "A GREAT BETRAYAL" as The British manipulated Siraj's ministers and bribed them to stand against the Nawab. Siraj was betrayed by his trusted ally Mir Jafar and other ministers. He lost the Battle of Plassey and Bengal lost itself to the western colonizers.