The British Raj is a Kingdom established on 28th June in 1858 by the British people after entering into India.
The Indian Nation Congress is a Political party formed on 28th December in 1885 to act against the British Rules in India.
Gandhi returns to India in the year of 1915 and introduced the plan of Sathyagraha (The Salt March) and then become the leader of the Indian National Congress.
The Salt March took place from March to April in the year 1930.