Jallianwala Bagh massacre
World War I began with large support and friendliness towards the United Kingdom from the leaders of India. This was not expected by the British, who thought there may be a revolt. India helped a lot to the British war effort by providing men and resources. About 1.3 million Indian soldiers and workers served in Europe, Africa, and the Middle East, while both the Indian government and the princes sent large supplies of food, money, and ammunition.