The Treaty of Saint-Germain was signed on September 10, 1919, following World War I. It officially ended hostilities between the Allied Powers and the newly formed Republic of Austria. The treaty aimed to dismantle the Austro-Hungarian Empire and establish new national boundaries in Central Europe. Under the treaty, Austria lost significant territories, including parts of Czechoslovakia, Italy, and Yugoslavia. It also imposed military restrictions and recognized the independence of several nations. The treaty was part of a series of agreements that reshaped Europe after the war, influencing the political landscape for decades.