The Treaty of Trianon was signed on June 4, 1920, in Paris as part of the post-World War I peace settlements. The treaty primarily affected Hungary, which was part of the Austro-Hungarian Empire before its dissolution in 1918. With the signing of the treaty, Hungary faced immense territorial losses, losing 71% of its pre-war territory. Regions that were once integral to Hungary, including Transylvania, Parts of Slovakia, and the Banat, were ceded to neighboring countries such as Romania, Czechoslovakia, and Yugoslavia. This acutely impacted the ethnic Hungarian population, as 63% of the population was separated from their homeland due to the new borders drawn in the treaty.The motivations behind these significant territorial changes were largely driven by national self-determination ideals promoted by U.S. President Woodrow Wilson. However, the treaty was met with hostility from Hungary, as the nation was forced to accept the terms without significant negotiations. The treaty imposed severe restrictions on military capabilities and economic rebuilding, further complicating Hungary's path to recovery after the devastation of World War I. The fallout from the Trianon Treaty resonated in Hungarian society for decades, shaping national identity and politics.The loss of territory led to feelings of resentment and a sense of injustice among Hungarians, fostering a narrative around the injustices of Trianon that would influence Hungarian politics and society for the rest of the 20th century. The interwar period saw rising nationalism within Hungary, contributing to the political climate that eventually facilitated the rise of authoritarian regimes. This complex set of circumstances underscores the Trianon Treaty as a critical moment in shaping Central and Eastern European history.