After graduating from Military School in 1903, he joined Ottoman Army as a lieutenant. He took his place in several military campaigns, starting from Yemen in 1908, Trablusgarp in 1910 and the Balkan Wars (1912-1913). Halit Bey was appointed to Caucasus Front during the First World War. He led successful campaigns in Kars, Sarikamis and Ardahan, however the Ottomans lost the war.