Question

what was the main causes of defeat of Nawab of Bengal in the Battle of Plassey

Answer 1

The main cause of defeat of Siraj-ud-Daulah was the betrayal of his army by Mir Zafar, one of the commanders of his army. Mir Zafar defected to the British with a major chunk of Siraj-ud-Daulah's army causing the defeat of the Nawab...

Answer 2

one of the main reasons for the defeat of the nawab was that the forces led by Mir Zafar , one of the Sirajuddaulah's commanders never fought the Battle . Clive hand managed to secure support by promising to make him nawab after crushing Sirajuddaulah .