Answer:
1- Sepoy Rebellion (May 10th, 1857)
2- British Raj established (June 28th, 1858)
3- World War I begins (July 28th, 1914)
4- Amritsar Massacre (April 13th, 1919)
Explanation:
1- The Rebellion of India in 1857 began as Sepoy rebellion, the Indian soldiers of the army of the British East India Company, on May 10, 1857 in the quartering of the town of Meerut. Soon there was an escalation of the conflict with the outbreak of other riots and civil unrest along the Gangetic plain and central India.
2- The British Raj was instituted on June 28, 1858, when after the Indian rebellion of 1857, the territorial possessions of the British East India Company were transferred to the Crown, then held by Queen Victoria.
3- World War I was a confrontation that began on July 28, 1914 when the Austro-Hungarians started hostilities with the attempted invasion of Serbia.
4- The Amritsar Massacre took place on April 13, 1919, when soldiers of the British Indian Army commanded by General Reginald Dyer machine-gunned a crowd of thousands of Sikh, Hindu, and Muslim unarmed men, women, and children who were gathered in the garden of Jallianwala for the festival of Vaisakhi.