Explanation: The Santhal rebellion, also known as the Santhal Hool in the Santhali language, started on June 1855 in present-day Jharkhand. The Santhals are the largest tribal group in India today as per the population figures. They are native to the Indian states of predominantly Jharkhand, West Bengal and Odisha. Until the century, they lived their lives in harmony with nature and practiced shifting agriculture and hunting. They lived in the hilly regions of Birbhum, Barabhum, Manbhum, Palamau and Chhotanagpur. These areas came under the Bengal Presidency whose rule passed onto the British after the Battle of Plassey in 1757 . The Santhal life was disrupted by the onslaught of the Zamindari system that they introduced. They were rendered landless bonded labourers in their own homes. The tribals engaged in commercial activity by the barter system. When currency was introduced because of the colonial intervention, they began to rely on the moneylenders. These moneylenders exploited them and reduced them to abject poverty. They were weighed down by heavy debts which kept mounting amidst the poverty and the humiliation of being landless in what was traditionally their turf. On June, two years before the Great Revolt of 1857 , two Santhal brothers Sidhu and Kanhu Murmu organised 10,000 Santhals and proclaimed a rebellion against the British. The tribals took an oath to drive away the British from their homeland.