Treaty of Trianon

President Mihály Károlyi's speech after the proclamation of the First Hungarian Republic on 16 November 1918 film: Béla Linder's pacifist speech for military officers, and declaration of Hungarian self-disarmament on 2 November 1918. Protest of the Transylvanian National Council against the occupation of Transylvania by Romania on 22 December 1918 Newsreel about Treaty of Trianon, 1920 The Treaty of Trianon (French: Traité de Trianon; Hungarian: Trianoni békediktátum; Italian: Trattato del Trianon; Romanian: Tratatul de la Trianon), often referred to in Hungary as the Peace Dictate of Trianon or Dictate of Trianon, was prepared at the Paris Peace Conference. It was signed on the one side by Hungary and, on the other, by the Allied and Associated Powers, in the Grand Trianon at Versailles on 4 June 1920. It formally terminated the state of war issued from World War I between most of the Allies of World War I and the Kingdom of Hungary. The treaty is famous primarily due to the territorial changes imposed on Hungary and recognition of its new international borders after the First World War.

As part of the Austro-Hungarian Empire, Hungary had been involved in the First World War since August 1914. After its allies signed armistices with the Entente, the political elite in Budapest also opted to end the war. On 31 October 1918, the Budapest government declared independence of Hungary from Austria and immediately began peace talks with the Allies which led to an armistice on 13 November 1918: Hungary demobilised its army and granted the Allies the right to occupy the country's south and east until a peace treaty was signed. In December 1918, Budapest allowed Czechoslovak troops to occupy the country's north as well. In exchange, Budapest hoped to reopen foreign trade and a supply of coal.