Causes

The defeat in the first Anglo-Sikh War and the provisions of the treaties of Lahore and Bhairowal were highly humiliating for the Sikhs. Inhuman treatment meted out to Rani Jindan, who was sent to Benares as a pensioner, added to the resentment of the Sikhs.

Mulraj, the governor of Multan, was replaced by a new Sikh governor over the issue of increase in annual revenue. Mulraj revolted and murdered two English officers accompanying the new governor. Sher Singh was sent to suppress the revolt, but he himself joined Mulraj, leading to a mass uprising in Multan. This could be considered as the immediate cause of the war. The then Governor-General of India, Lord Dalhousie, a hardcore expansionist, got the pretext to annex Punjab completely.