Santhal rebellion
The Santhal rebellion (also known as the Sonthal rebellion or the Santhal Hool), was a rebellion in present-day Jharkhand and West Bengal against  the East India Company (EIC) and zamindari system by the Santhal. It started on June 30, 1855, and on November 10, 1855, martial law was proclaimed by the East India Company which lasted until January 3, 1856, when martial law was suspended and the rebellion was eventually suppressed by the Presidency armies. The rebellion was led by the four sibling Brothers - Sidhu, Kanhu, Chand and Bhairav. Background
The rebellion of the Santhals began as a reaction to end the revenue system of the East India Company (EIC), 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 East India Company. The Santhals lived in a territory that stretched from Hazaribagh to Medinipur, along the Subarnarekha River, and they depended on agriculture. Those areas were greatly affected by the 1770 Bengal famine. In 1832, the EIC demarcated the Damin-i-koh region in present-day Jharkhand and encouraged the pre-existed Paharia tribe of the Rajmahal hills to clear forests and practice agriculture. However, the Paharia tribe declined the offer, leading the company to invite the Santhals to settle in the region. Due to promises of land and economic amenities a large numbers of Santhals came to settle from Dhalbhum, Manbhum, Hazaribagh, Midnapore, and other surrounding areas. Soon, their population increased significantly from 3,000 to 83,000 in between 1830 and 1850. This growth in the number of agriculturists resulted in a 22-fold increase in Company revenue from the area. Subsequently, Mahajans and zamindars, acting as money lenders, tax collectors, and other intermediaries employed by the EIC, came to dominate the local economy, governance, and administration. Many Santals became victims of corrupt money lending practices. They were lent money at exorbitant rates. When they were unable to repay the loan, their lands were forcibly taken and they were forced into bonded labour. This sparked the Santals to mobilize against the intermediaries, eventually leading to a rebellion against the East India Company and the establishment of self-governance. Rebellion
On 30 June 1855, two Santal rebel leaders, Sidhu and Kanhu Murmu, mobilized roughly 60,000 Santhals and declared a rebellion against the East India Company. Sidhu Murmu had accumulated about ten thousand Santhals to run a parallel government during the rebellion. The basic purpose was to collect taxes by making and enforcing his own laws. Soon after the declaration, the Santhals took to arms. In many villages, the Zamindars, money lenders, and their operatives were executed. The open rebellion caught the Company administration by surprise. Initially, a small contingent was sent to suppress the rebels but they were unsuccessful and this further fueled the spirit of the revolt. When the law and order situation was getting out of hand, the Company administration finally took a major step and sent in a large number of troops assisted by the local Zamindars and the Nawab of Murshidabad to quell the Rebellion. The East India Company announced an bounty of Rs. 10,000 to arrest Sidhu and his brother Kanhu Murmu. A number of skirmishes occurred after this which resulted in a large number of casualties for the Santhal forces. The primitive weapons of the Santhals proved to be unable to match the gunpowder weapons of the East India Company military. Troop detachments from the 7th Native Infantry Regiment, 40th Native Infantry, and others were called into action. The revolt was eventually suppressed after Sidhu and Kanhu were killed in action. War elephants, supplied by the Nawab of Murshidabad, were used to demolish Santhal huts during the rebellion. In this event, over 15,000 were killed, tens of villages were destroyed, and many were displaced during the rebellion. During the rebellion, the Santhal leader was able to mobilize roughly 60,000 Santhal forming groups, with 1500 to 2000 people forming a group. The rebellion is supported by poor tribals and non-tribals like Gowalas and Lohars (who were milkmen and blacksmiths) in the form of providing information and weapons. Ranabir Samaddar argues that apart from Santhals, other aboriginal inhabitants of the region like Kamars, Bagdis, Bagals and others also participated in the rebellion. Legacy 
English author Charles Dickens, in Household Words, wrote the following passage on the rebellion:

<blockquote> There seems also to be a sentiment of honor among them; for it is said that they use poisoned arrows in hunting, but never against their foes. If this be the case and we hear nothing of the poisoned arrows in the recent conflicts, they are infinitely more respectable than our civilized enemy, the Russians, who would most likely consider such forbearance as foolish, and declare that is not war. "</blockquote>

Mrinal Sen's film Mrigayaa'' (1976) is set during the Santhal rebellion

