Question

what was the new political policy devices by Dalhousie?How did he use that as a political weapon? ​

Answer 1

Answer:

The main political cause for the great revolt of 1857 was the policy of Doctrine of Lapse. It was an annexation policy purportedly devised by Lord Dalhousie as per which any princely state or territory under the British East India Company would automatically be annexed if the ruler died without a male heir.