Nawab Wajid Ali Shah, the final monarch of Awadh, was removed from power by the British in 1856. This event officially led to the British East India Company's incorporation of Awadh (also known as Oudh). The British had consistently criticized Wajid Ali Shah's governance, citing alleged incompetence and excessive spending as justifications for his dethronement.
The annexation of Awadh was a pivotal incident preceding the 1857 Revolt. The loss of their territory and the deposition of their leader incited widespread anger in Awadh, notably among the sepoys, who had significant connections to the Nawab's administration. This dissatisfaction was a principal catalyst for the larger uprising.
Consequently, the correct year is 1856.