Question

How did the competition in trade lead to fierce battles?​

Answer 1

Answer:

As competition grew, profits fell, and the European trading companies started building forts and fighting each other. ... The employees of the Company also carried on their private trades, and so were expected to pay duty. But they refused, which angered the Nawab of Bengal, Murshid Quli Khan, and led to fierce battles.

Answer 2

After the death of Aurangzeb, the Bengal Nawabs asserted their power and autonomy.

The Nawabs of Bengal refused to grant the company concessions as it was making the  revenue from Bengal trade less profitable.

The British wanted the duties to be abolished but Bengal nawabs refused.

British official knew the condition of administration in Bengal and tried their autonomy by use of force.