Treaty of Trianon

The Treaty of Trianon was the peace agreement of 1920 that formally ended World War I between most of the Allies of World War I and the Kingdom of Hungary, the latter being one of the successor states to Austria-Hungary. The treaty regulated the status of an independent Hungarian state and defined its borders. It left Hungary as a landlocked state that covered 93,073 square kilometres, only 28% of the 325,411 square kilometres that had constituted the pre-war Kingdom of Hungary. Its population was 7.6 million, only 36% of the pre-war kingdom's population of 20.9 million. The outcome of the Treaty of Trianon is to this day remembered in Hungary as the Trianon trauma.