By comparison, Hungary had been a nation and a state for over 900 years. Hungary, however, was severely disrupted by the loss of 72% of its territory, 64% of its population and most of its natural resources. The Hungarian Democratic Republic was short-lived and was temporarily replaced by the communist Hungarian Soviet Republic. Romanian troops ousted Béla Kun and his communist government during the Hungarian–Romanian War of 1919.
In the summer of 1919, a Habsburg, Archduke Joseph August, became regent, but was forced to stand down after only two weeks when it became apparent the Allies would not recognise him.[10] Finally, in March 1920, royal powers were entrusted to a regent, Miklós Horthy, who had been the last commanding admiral of the Austro-Hungarian Navy and had helped organize the counter-revolutionary forces. It was this government that signed the Treaty of Trianon under protest on 4 June 1920 at the Grand Trianon Palace in Versailles, France. The restored Kingdom of Hungary lost roughly 72% of the pre-war territory of the Kingdom of Hungary