I have played the Svalts hundreds of times and have always tried to ally with the Ljos every game that they are on the map.....they just wont do it. Ive met all the requirements: the best relations, help in war, give whatever they ask, defensive pacts for 40+ turns.
But they will never ally. Is it hard-coded to never allow it?
But they will never ally. Is it hard-coded to never allow it?