Dalhousie became the Governor-General of India in 1848 and made an attempt to integrate Indian princely states with the British Empire.
He introduced the Doctrine of Lapse policy which states that the adopted children of Indian Kings were refused of their right to throne.
According to this policy, “If any Indian ruler dies without children, their adopted children had no legal right over the throne”. In such a situation, that state would get merged with the British Empire.
Princely states like Satara, Nagpur, Sambalpur, Udaipur, Jhansi, Jaipur came under this policy.