Cihangirzade İbrahim Bey (1874-1948) (İbrahim Aydın after the 1934 Law on Family Names in Turkey, although he is more commonly called under the name he was known prior to the law) was a Turkish military officer, statesman and administrator who served the Ottoman Empire and after its defeat in World War I, became the leader of the Turkish revolutionaries in his native Kars and in Southwest Caucasia. After the Armistice of Mudros, he led the First Congress of Ardahan, establishing a local administration, and was later declared the head of the Southwest Caucasian National Resistance Government on 5 November 1918. This movement took control of the cities of Kars, Ardahan and Batum in late-1918.