On July 26, 1948, President Harry S. Truman signed this executive order establishing the President's Committee on Equality of Treatment and Opportunity in the Armed Services, committing the government to integrating the segregated military.
The answer is the 14th amendment.
The events are in this order as occured in the world history;
1) Sepoy Rebellion (This is also known as Indian Mutiny, the Great Rebellion, the Revolt of 1857 etc. and was the first major uprising against East India Company and reportedly set path for the establishment of British Raj in India)
2) British Raj established. (1858)
3) World War 1 (1914)
4) Amritsar Massacre (1919) (This is also known in Indian History as The Jallianwala Bagh massacre)
