The movement had a sudden decline with rising incidences of violence; a nationalist mob killed 22 policemen in Chauri Chaura in 1922. Fearing degeneration into violence, Gandhi asked Indians to suspend the revolt and undertook a five-day fast to repent and encourage others to stop the rebellion. Although the movement stopped all over India, several Congress leaders and activists were disillusioned with Gandhi. The following year, the caliphate was overthrown by Mustafa Kemal Atatürk and the Ali brothers grew distant and critical of Gandhi and the Congress. Azad's close friend Chittaranjan Das co-founded the Swaraj Party, breaking from Gandhi's leadership. Despite the circumstances, Azad remained firmly committed to Gandhi's ideals and leadership. In 1923, he became the youngest man to be elected Congress president. Azad led efforts to organise the Flag Satyagraha in Nagpur. Azad served as president of the 1924 Unity Conference in Delhi, using his position to work to re-unite the Swarajists and the Khilafat leaders under the common banner of the Congress. In the years following the movement, Azad travelled across India, working extensively to promote Gandhi's vision, education and social reform.