According to local legend, his father raised the demand for Indian independence at the 1911 Delhi Durbar.
It was used for a series of films including the documentary With Our King and Queen Through India, depicting the Delhi Durbar (also known as The Durbar at Delhi, 1912), which was filmed in December 1911.
He was instrumental in formation of All India Yadav Mahasabha and raised the demand for Indian independence at the 1911 Delhi Durbar.
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Sardar Badan Singh was an invitee to the Delhi Coronation Durbar held in December 1911 to commemorate the coronation of King George V and Queen Mary as Emperor and Empress of India and received Delhi Durbar Medal 1911.
Raja Jahandad Khan married a daughter of the Afghan Amir Sher Ali Khan and had three sons - Captain Raja Haider Zaman (MBE, Delhi Durbar Medal, Dehli Coronation Medal, Chairman District board Hazara), Raja Manochehar Khan and Raja Safdar Khan.