The Khilafat Movement was a significant Islamic movement organized in India from 1919-1924 by the Ali brothers to unite Indian Muslims in support of the Ottoman Sultan. The movement sought to defend the Turkish Empire and the Khalifa against attacks by European powers. Though it gained popularity initially by aligning with Gandhi's non-cooperation movement, the Khilafat Movement declined after violent incidents led to its suspension and finally ended when Turkey abolished the Khalifate and became a republic in 1924.