The Santhal rebellion, or Santhal Hul (1855-56), was led by the brothers Sidhu Manjhi and Kanhu Manjhi. This rebellion was a response to the exploitative land revenue policies of the British and the oppression by moneylenders. The Santhals, an indigenous tribe in Bihar and Bengal, organized the uprising to challenge British authority and protect their lands from encroachment. The rebellion is significant as it led to the creation of the Damin-i-Koh region, a special settlement area for the Santhals.