As it stands, attacking a enemy using the Holy War CB puts the attacker at a severe disadvantage, as the defenders neighbours can dogpile them, and leading to certain defeat. At present, this is a problem in Spain, where the Catholics have, in all of my games, bashed themselves to bits trying to defeat the Iberian-Penisular-Treaty-Origanization and get swallowed by the Emirates of Spain.
By changing it so that Holy Wars can have other nations called in on both sides allows this to balance itself out. Sure, Leon can attack Beja, but if Beja calls in Valencia, then Leon can call on France for help. This should balance out the Reconqistia, as without French or German help, the Spanish Kingdoms get gobbled up time and time again.
Thoughts? Anyone had any experiances with Iberia that trend different?