The Ankara Government was founded to represent Turkey because the "de jure" capital, Constantinople, was under occupation. President of the GNA (renamed the "Grand National Assembly of Turkey" after 8 February 1921) and later of the Republic of Turkey, was Mustafa Kemal. Once the Armistice of Mudanya was signed, replacing the Armistice of Mundros (signed by the Ottoman Empire in 1918 at the end of World War I) and ending the Turkish War of Independence, the GNA abolished the imperial Sultanate, which was accused of collaborating with the Allies during the occupation of Turkey.