Sun Aug 09, 2015 3:20 pm
Actually, it looks like the other neutrals may have been removed from the join scripts at some point, I don't see them there anymore. So the OOB would have to be added in for the nation to have any contribution.
If you are interested in scripting this, look in the WW1_Evt_Diplomacy_Joins event file. The last two events are small examples of what happens when ARA (Arabian) faction joins a side. You could copy these two events, replace the ARA references with whichever faction you want to add (SPA for Spain, NOR for Norway, SWE for Sweden, etc) and adjust the OOB entries to suitable OOB for the nation. This should work, though I haven't tested it out.