I’d suggest modifying this by breaking the TNs down into 8 regional or colonial factions, which are only provoked to war by an attack on another member of their own group:
1. South America (10 countries)
2. Spain & Rio de Oro
3. Portugal, Portuguese Guinea, Angola & Mozambique
4. Switzerland
5. Sweden
6. Turkey, Saudi Arabia & Afghanistan
7. Mongolian tts
8. Liberia & Sierra Leone (SL should of course be a UK tt, and Liberia was virtually an unofficial US colony, but it’s convenient to group them together)
We might put Sweden and the Swiss together, but these 2 were so independent I doubt anyone else would put out for them.
To balance this some of these countries can have their defence forces beefed up, for example some armour in Sweden or a small Spanish fleet.