Nawab Siraj -ud-daulah of Bengal was defeated by the English in the battle of Plassey, mainly

• because the English Forces were much stronger than those of the Nawab
• because of Clive's conspiracy with the Nawab's Commander-in-Chief Mir Jafar and rich bankers of Bengal
• because of Siraj-ud-Daulah's retirement from the battlefield
• because of the capture of a band of frenchmen under the Nawab's service by the English