Which aspect was addressed in the Treaty of Saint-Germain?

The Treaty of Saint-Germain, signed in 1919, primarily dealt with the disintegration of the Austro-Hungarian Empire and its political ramifications. One of the most significant aspects was the commitment to the breakup of the empire into several independent nations, notably Austria and Hungary, as well as the emergence of Czechoslovakia, Yugoslavia, and others.

While the treaty did touch upon various issues, such as limiting the size of the Austrian army and some reparative measures, the critical focus was on reshaping the map of Central Europe through the dissolution of a multi-ethnic empire into nation-states based on ethnic lines. This reconfiguration aimed to address national self-determination, which was a central principle advocated during and after World War I.

Thus, the treaty's primary contribution was the emphasis on the breakup of the Austro-Hungarian Empire, making this aspect most relevant when considering the treaty's significance in the post-war settlement.