The First World War caused very deep and fundamental changes in Central and Eastern Europe. The biggest loser of the war was the Austro-Hungarian Monarchy. Kingdom of Hungary as one of its parts was dissolved in the framework of Trianon Peace Treaty. The new Hungary could retain only 28,6% of the former territory and 36,5% of its former population. After 1920 the League of Nations was planned a new collective European security system.
* The research has been implemented with support provided from the National Research Development and Innovation Fund of Hungary (Geopolitical Processes and Imaginaries in Central Europe: States, Borders, Integration and Regional Development: NKFI K 134903). Translated by Katalin Süle.
