The armistice of Belgrade was an agreement on the termination of World War I hostilities between the Triple Entente and the Kingdom of Hungary concluded in Belgrade on 13 November 1918. It was largely negotiated by General Louis Franchet d'Espèrey, as the commanding officer of the Allied Army of the Orient, and Hungarian Prime Minister Mihály Károlyi, on 7 November. It was signed by General Paul Prosper Henrys and vojvoda Živojin Mišić, as representatives of the Allies, and by the former Hungarian Minister of War, Béla Linder.

Count Mihály Ádám György Miklós Károlyi de Nagykároly was a Hungarian politician who served as a leader of the short-lived and unrecognized First Hungarian Republic from 1918 to 1919. He served as prime minister between 1 and 16 November 1918 and as president between 16 November 1918 and 21 March 1919.