In 1919 European boundaries were changed?

After World War I, the Treaty of Versailles in 1919 redrew many European boundaries, particularly in Central and Eastern Europe, creating new countries such as Poland, Czechoslovakia, and Yugoslavia. The treaty aimed to weaken Germany and Austria-Hungary by transferring territories to neighboring countries or creating new nations altogether. These boundary changes had significant political and ethnic implications that shaped the region's history throughout the 20th century.