Upon his release, Azad returned to a political atmosphere charged with sentiments of outrage and rebellion against British rule. The Indian public had been angered by the passage of the Rowlatt Acts in 1919, which severely restricted civil liberties and individual rights. Consequently, thousands of political activists had been arrested and many publications banned. The killing of unarmed civilians at Jallianwala Bagh in Amritsar on 13 April 1919 had provoked intense outrage all over India, alienating most Indians, including long-time British supporters, from the authorities. The Khilafat struggle had also peaked with the defeat of the Ottoman Empire in World War I and the raging Turkish War of Independence, which had made the caliphate's position precarious. India's main political party, the Indian National Congress came under the leadership of Mahatma Gandhi, who had aroused excitement all over India when he led the farmers of Champaran and Kheda in a successful revolt against British authorities in 1918. Gandhi organised the people of the region and pioneered the art of "Satyagraha"— combining mass civil disobedience with complete non-violence and self-reliance.