Modern Indian History
The immediate cause of the Battle of Plassey was

Misuse of Dastaks (passes for free trade) by the Company and its officials
The English attempts to strengthen their fortifications at Fort William
The English support and asylum to the political rivals of Nawab Siraj-ud-Daulah
Siraj-ud-Daulah's attack on Fort William and capture of Calcutta (Alinagar)

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