<P> A large number of Muslim religious leaders began working to spread awareness and develop Muslim participation on behalf of the Caliphate . Muslim religious leader Maulana Mehmud Hasan attempted to organize a national war of independence against the British with support from the Ottoman Empire . </P> <P> Abdul Hamid II was forced to restore the constitutional monarchy marking the start of the Second Constitutional Era by the Young Turk Revolution . He was succeeded by his brother Mehmed VI (1844--1918) but following the revolution, the real power in the Ottoman Empire lay with the nationalists . The movement was a topic in Conference of London (February 1920); however, nationalist Arabs saw it as threat of continuation of Islamic dominance of Arab lands . </P> <P> The Ottoman Empire, having sided with the Central Powers during World War I, suffered a major military defeat . The Treaty of Versailles (1919) reduced its territorial extent and diminished its political influence but the victorious European powers promised to protect the Ottoman emperor's status as the Caliph . However, under the Treaty of Sèvres (1920), territories such as Palestine, Syria, Lebanon, Iraq, Egypt were severed from the empire . </P> <P> Within Turkey, a pro-Western, secular nationalist movement arose, known as the Turkish national movement . During the Turkish War of Independence (1919--1923), the Turkish revolutionaries, led by Mustafa Kemal Atatürk, abolished the Treaty of Sèvres with the Treaty of Lausanne (1923). Pursuant to Atatürk's Reforms, the Republic of Turkey abolished the position of Caliphate in 1924 and transferred its powers within Turkey to the Grand National Assembly of Turkey . </P>

Who was elected as president of all india khilafat conference held in delhi in 1919