What is the Battle of Plassey?
It is a battle fought between the East India Company force headed by Robert Clive and Siraj-Ud-Daulah (Nawab of Bengal). The rampant misuse by EIC officials of trade privileges infuriated Siraj. The continuing misconduct by EIC against Siraj-Ud-Daulah led to the battle of Plassey in 1757.
Majorly, the reasons for the Battle of Plassey to take place were:
The rampant misuse of the trade privileges given to the British by the Nawab of Bengal
Non-payment of tax and duty by the workers of the British East India Company