Udham Singh left the Orphanage after passing the matriculation examination in 1918. He was present in the Jallianvala Bag on the fateful Baisakhi day, 13 April 1919, when a peaceful assembly of people was fired upon by General Reginald Edward Harry Dyer, killing over one thousand people. The event which Udham Singh used to recall with anger and sorrow, turned him to the path of revolution. Soon after, he left India and went to the United States of America. He felt thrilled to learn about the militant activities of the Babar Akalis in the early 1920's, and returned home. He had secretly brought with him some revolvers and was arrested by the police in Amritsar, and sentenced to four years imprisonment under the Arms Act. On release in 1931, he returned to his native Sunam, but harassed by the local police, he once again returned to Amritsar and opened a shop as a signboard painter, assuming the name of Ram Muhammad Singh Azad. This name, which he was to use later in England, was adopted to emphasize the unity of all the religious communities in India in their struggle for political freedom.
Udham Singh was deeply influenced by the activities of Bhagat Singh and his revolutionary group. In 1935, when he was on a visit to Kashmlr, he was found carrying Bhagat Singh's