Map of Europe in 1923.
<a href="//commons.wikimedia.org/wiki/User:Tet" title="User:Tet">Tet</a>
CC BY-SA 2.5
Own work based on: <a href="//commons.wikimedia.org/wiki/File:Map_Europe_1923-en.svg" title="File:Map Europe 1923-en.svg">Map Europe 1923-en.svg</a>