The importance of Komagata Maru Incident lies in the fact that it created an explosive situation in the Punjab. Komagata Maru was the name of a ship which was carrying 370 passengers, mainly Sikh and Punjabi Muslim would-be immigrants, from Singapore to Vancouver. They were turned back by Canadian authorities after two months of privation and uncertainty. It was generally believed that the Canadian authorities were influenced by the British government. The ship finally anchored at Calcutta in September 1914. The inmates refused to board the Punjab- bound train. In the ensuing conflict with the police at Budge Budge near Calcutta, 22 persons died.
Inflamed by this and with the outbreak of the First World War, the Ghadr leaders decided to launch a violent attack to oust British rule in India. They urged fighters to go to India. Kartar Singh Saraba and Raghubar Dayal Gupta left for India. Bengal revolutionaries were contacted; Rashbehari Bose and Sachin Sanyal were asked to lead the movement. Political dacoities were committed to raise funds. The Punjab political dacoities of January-February 1915 had a somewhat new social content. In at least 3 out of the 5 main cases, the raiders targeted the moneylenders and the debt records before decamping with the cash. Thus, an explosive situation was created in Punjab.
The Ghadrites fixed February 21, 1915 as the date for an armed revolt in Ferozepur, Lahore and Rawalpindi garrisons. The plan was foiled at the last moment due to treachery. The authorities took immediate action, aided by the Defence of India Rules, 1915. Rebellious regiments were disbanded, leaders arrested and deported and 45 of them hanged. Rashbehari Bose fled to Japan (from where he and Abani Mukherji made many efforts to send arms) while Sachin Sanyal was transported for life.