What areas did Austria lose after World War 1?

After World War I, Austria lost significant territories as a result of the Treaty of Saint-Germain in 1919. The most notable areas lost included South Tyrol and Trentino to Italy, and parts of its eastern territories to the newly formed states of Czechoslovakia and Yugoslavia. Additionally, Austria's borders were redrawn, leading to the loss of its access to the sea and reducing its overall size and population. This loss of territory contributed to the economic difficulties and national identity crises that Austria faced in the interwar period.