Lal Singh was the commander of the Sikh army during the first Anglo Sikh war. The treachery of Lal Singh and Teja Singh helped the British to acquire Lahore without a single battle.
for being an active member of the Anushilan Samiti, the first revolutionary organisation in Bengal
for attempting to murder Kingsfords, the Chief Presidency Magistrate at Muzaffarpur, who had ordered severe flogging to some young men for minor offences.