I will quote what the GM has written
I intend to run a text-based, turn-based simulation set in the year 1919, in which participants join as leaders of countries, parties, rebellions, armed forces, cabinets, or particular individuals.
Here is the URL http://eregime.org/forum/5001898/
There are already over 70 participants. The simulation will not start until May or June but participants are already discussing things like postwar treaties to be decided at the Paris Peace Conference.