The Santhal rebellion (sometimes referred to as the Sonthal rebellion), commonly known as Santhal Hool, was a rebellion in present-day Jharkhand, in eastern India against both the British colonial authority and zamindari system by the Santhal people. It started on June 30, 1855 and on November 10, 1855 martial law was proclaimed which lasted until January 3, 1856 when martial law was suspended and the movement was brutally ended by troops loyal to the British. The rebellion was led by the four Murmu Brothers - Sidhu, Kanhu, Chand and Bhairav.
The uprising of the Santhals began as a reaction to end despotic British revenue system, usury practices, and the zamindari system in India; in the tribal belt of what was then known as the Bengal Presidency. It was a revolt against the oppression of the colonial rule propagated through a distorted revenue system, enforced by the local zamindars, the police and the courts of the legal system set up by the British.
The Santhals lived in and depended on forests. In 1832, the British demarcated the Damin-i-koh region in present day Jharkhand and invited Santhals to settle in the region. Due to promises of land and economic amenities a large numbers of Santhals came to settle from Cuttack, Dhalbhum, Manbhum, Hazaribagh, Midnapore etc. Soon, mahajans and zamindars as tax-collecting intermediaries deployed by British dominated the economy. Many Santals became victims of corrupt money lending practices. They were lent money at exorbitant rates when they never repay then their lands were forcibly taken, they were forced into bonded labour. This sparked the Santal rebellion by Sidhu and Kanhu Murmu, two brothers who led the Santals against the Britishers but were defeated.