The primary result of the Treaty of Trianon for Hungary was the significant reduction of its territory and population. Signed in 1920 after World War I, the treaty resulted in Hungary losing about two-thirds of its land to neighboring countries such as Romania, Czechoslovakia, and Yugoslavia. This loss had profound national and cultural implications, fostering feelings of resentment and irredentism among Hungarians. The treaty not only affected Hungary's borders but also its economy and demographic landscape, creating lasting disputes in the region.