So because of this Britishers were able to use the divide and rule policy on them.

Policy of War with Local Rulers after Battle of Plassey and Buxar
After the victories at the Battle of Plassey (1757) and Buxar (1764), the British East India Company adopted a policy of war with local rulers in India for several reasons:

Establishing British dominance
- The victories at Plassey and Buxar gave the British a significant advantage over local rulers in India.
- By following a policy of war, the British aimed to solidify their dominance and establish themselves as the supreme power in the region.

Expansion of territories
- Through military conquests, the British were able to expand their territories in India.
- The policy of war allowed them to annex more regions and increase their control over valuable resources.

Consolidation of power
- Engaging in wars with local rulers helped the British consolidate their power and control over the Indian subcontinent.
- It enabled them to weaken rival powers and eliminate potential threats to their authority.

Economic gains
- The British East India Company sought to extract economic benefits from their conquests.
- By engaging in wars with local rulers, they could establish control over trade routes, resources, and markets, leading to increased profits.

Maintaining supremacy
- Following a policy of war with local rulers was essential for the British to maintain their supremacy in India.
- It allowed them to assert their authority and prevent any challenges to their rule.
In conclusion, the British followed a policy of war with local rulers after the Battle of Plassey and Buxar to establish dominance, expand territories, consolidate power, gain economic advantages, and maintain supremacy in India.