Question

the battle of made the english east india company a sovereign power in india

Answer 1

Wealthy merchants and aristocrats owned the company's shares. ... The Battle of Plassey and Battle of Buxar, in which the British, led by Robert Clive, defeated the Indian powers, left the company in control of Bengal and a major military and political power in India.
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Answer 2

The battle of Plassey made the English east india company conquer bengal.