In the first indian war of independence, what was the main reason the british were able to defeat the indians

There are a good number of reasons why the British were able to do so which are given below:

Disunity among Indian princely states.

Superiority over other colonial powers.

Doctrine of Lapse

Siege of Yorktown, joint Franco-American land and sea campaign that entrapped a major British army on a peninsula at Yorktown, Virginia, and forced its surrender. The siege virtually ended military operations in the American Revolution.

Start date: September 28

End date: October 19, 1781