Sukhdev Thapar was an Indian revolutionary who played an important role in the Indian independence movement. He was one of the three martyrs of the historic Lahore conspiracy case, the other two being Bhagat Singh and Rajguru. He was born in 1907 in Ludhiana in Punjab, India.

Sukhdev was a committed socialist who, along with Bhagat Singh and Rajguru, formed a group called the Hindustan Socialist Republican Association (HSRA) in 1928. This group was dedicated to the cause of Indian independence through revolutionary means. He and his associates actively participated in a number of anti-British protests and demonstrations, including the bombing of the Central Legislative Assembly in Delhi, in 1929.

Sukhdev was a major contributor to the Indian independence movement and was one of the most influential figures in the struggle. He was an excellent orator and propagandist and was able to spread the message of freedom and independence among the masses. He was also a skilled organizer and helped to organize many strikes and protests against British rule.

Sukhdev was also a key figure in the formation of the Indian National Congress in 1930. He was a strong advocate of the cause of independence and was one of the main organizers of the famous Dandi March in 1930, which was one of the most important steps in the struggle for freedom from British rule.

Sukhdev was also actively involved in the Quit India Movement, launched by Mahatma Gandhi in 1942. He was arrested in July 1942 and was sentenced to death in October of the same year. He was hanged on 23rd March 1931 in Lahore.

Sukhdev's martyrdom, along with that of Bhagat Singh and Rajguru, served as an inspiration to many Indian freedom fighters, who continued the struggle for independence. His commitment and dedication to the cause of Indian independence will forever be remembered and respected.