- You can only divide Yugoslavia yourself or invite: Hungary, Germany or Italy.
Why can't you invite Bulgaria (who had claims over Yugoslavia) and Greece (the player may accept) too? I don't know.
- In order to send an ultimatum, you need to have at least 1 claim in every region.
- If you don't invite anyone, you have to spend a lot of days to make 1 claim in every region.
Why can't you automatically send an ultimatum if you're alone? or split Yugoslavia in 3 puppets like it used to be? I don't know.
- Every region can have a maximum of 3 claims, the country who gets most claims in a region gets that region if Yugoslavia accepts.
- When every Yugoslav region has at least 1 claim, no matter from which of the invited countries, you will be allowed to send the ultimatim.
In theory: This sounds like a great political game, where you are diplomatically fighting to get the biggest share of Yugoslavia.
In practice: Yugoslavia will never accept, even if Yugoslavia has 22 divisions and the demanding countries have a total of 100 divisions.
Why won't Yugoslavia give in when they clearly can't win, such as the enemy countries having an over 3 to 1 army ratio compared to them? I don't know.
Sadly, in the end, it's just a method of declaring war on Yugoslavia. When you invite countries to divide Yugoslavia, you're really inviting countries to join the war.