Question

all points of plassey battle

Answer 1

when Alivardi Khan died in 1756,Sirajuddaulah became the nawab of Bengal. The company was worried about his power and keen on a puppet ruler who would willingly give trade concessions and other privileges. So it tried, though without success, to help one of the Sirajuddaula's rivals become the nawab. An infuriated Sirajuddaula asked the company to stop meddling in the political affairs this dominion, stop fortifications, and pay the revenues. After negotiations failed, the the Nawab marched with 30,000 soldiers to the English factory at Kassimbazar, captured the Company officials, locked the warehouse, disarmed all Englishmen , and blockaded English ships. Then he marched to Calcutta to establish control over the Company's fort there.
On hearing the news of the fall of Calcutta, Company officials in Madras sent forces under the command of Robert Clive, reinforced by naval fleets. Prolonged negotiations with the Nawab followed. Finally, in 1757, Robert Clive led forces against Sirajuddaula at Plassey . One of the main reasons for the defeat of the Nawab was that the forces led by Mir Jafar, one of Sirajuddaula's commandes, never fought the battle. Clive had managed o secure his support by promising to make him nawab after crushing Sirajuddaula.
The battle of Plassey became famous because it was the first major victory of the company won in India.