Solution:In 1855-56, Sidhu, Kanhu, Chand, and Bhairav, the four brothers, gave a call for rebellion. The rebellious Santhals assembled and raised their arms against the British revenue system.The Santhal Hul of 1855 was one of the earliest peasant uprisings against British colonial rule in India. Led by four brothers - Sidho, Kanho, Chand, and Bhairav Murmu - along with sisters Phulo and Jhano, the revolt began on 30th June 1855. The revolt targeted not only the British but also upper castes, zamindars, darogas, and moneylenders, collectively termed 'diku'. It aimed to protect the economic, cultural, and religious rights of the Santhal community.