I have started a game from Gaius Marius scenario and am trying to deal with Numidia. I have been tryng to get Massila to aid me in this. I have taken Mauretania (so the can get into Africa without ships), given them Call to Arms and military access but the best that happens is one unit wanders into Spain and then heads back to Massilia. Funny thing is if I load up a saved game with these things done and switch to playing Numidia the Massilian units will quite happily tear into Africa.