What can you infer was a reason for the border changes to Europe in 1919?

National security concerns: The end of World War I left many countries in Europe feeling vulnerable and insecure. As a result, they sought to redraw their borders to make them more defensible. For example, France wanted to create a buffer zone between itself and Germany, so it gained control of Alsace-Lorraine.

Economic interests: The new borders also reflected the changing economic landscape of Europe. Some countries, such as Poland, were created to give access to natural resources and markets. For example, Poland was given control of Upper Silesia, which was a major coal-producing region.

Ethnic considerations: The peacemakers at Versailles also tried to create borders that reflected ethnic boundaries. However, this was not always possible, and in some cases, it led to further conflict. For example, the creation of Czechoslovakia resulted in the inclusion of a large number of ethnic Germans, who felt discriminated against by the Czech government.

The desire to punish Germany: The peacemakers at Versailles also wanted to punish Germany for starting World War I. As a result, Germany lost a significant amount of territory, including Alsace-Lorraine, Eupen-Malmédy, North Schleswig, and West Prussia.