Who was Sukhdev?

Sukhdev Thapar was an Indian revolutionist/ He was a prominent member of the Hindustan Socialist Republic Association and participate din several moments with Bhagat Singh, Shivram Rajguru etc. He was the chief of the Punjab unit of HRSA and conducted activities in Punjab and certain regions in North India. He was the first accused in the Lahore Conspiracy Case, 1929. He was hanged by the British on 23 March 1931 with Bhagat Singh and Rajguru.