British Mandate of Palestine, 1920s.  Note that only the border with Egypt was fixed and stable by 1920; the other borders were changing and/or somewhat undetermined before being specified in the 1923 Mandate document.
<a href="https://en.wikipedia.org/wiki/User:Aiden" class="extiw" title="en:User:Aiden">en:User:Aiden</a>, <a href="https://en.wikipedia.org/wiki/User:Ramallite" class="extiw" title="en:User:Ramallite">en:User:Ramallite</a>, <a href="https://en.wikipedia.org/wiki/User:Zero0000" class="extiw" title="en:User:Zero0000">Zero0000</a> and <a href="https://pt.wikipedia.org/wiki/User:Pedroca_cerebral" class="extiw" title="pt:User:Pedroca cerebral">pt:User:Pedroca cerebral</a>
<a href="//commons.wikimedia.org/wiki/File:BritishMandatePalestine1920.png" title="File:BritishMandatePalestine1920.png">File:BritishMandatePalestine1920.png</a>