Surya Sen, also called Surya Kumar Sen (22 March 1894 – 12 January 1934), was an Indian revolutionary who was influential in the Indian independence movement against British rule in India and is best known for leading the 1930 Chittagong armoury raid.
Sen was a school teacher by profession and was popularly known as Master Da ("da" is an honorific suffix in Bengali language). He was influenced by the nationalist ideals in 1916 while he was a student of B.A. in Berhampore College (Now MES College).In 1918, he was selected as president of the Indian National Congress's Chittagong branch. Sen was known for recruiting a group of young and passionate revolutionaries known as the Chittagong group. The group included Ananta Singh, Ganesh Ghosh and Lokenath Bal, and fought against the British stationed in Chittagong.
He was an active participant in the Non-co-operation movement and was later arrested and imprisoned for 2 years from 1926 to 1928 for his revolutionary activities. A brilliant and inspirational organiser, Sen was fond of saying "Humanism is a special virtue of a revolutionary.