A good starting point is to list all of the nations that were represented at the peace conference in 1919.
These were 32 allied and associated powers, either as voting members or as observers. This number consisted of:
- The thirty sovereign nations that declared war (see list to follow),
- Less Montenegro, which was included in the 1919 Jugo-Slav state along with Bosnia, Croatia and Slovenia,
- Less Newfoundland and
- Including Czechoslovakia, the Arab state of Hedja, Poland and the 1919 Jugo-Slav state.
The five defeated nations were also allowed to be represented but were excluded from all of the deliberations.