Does 1 fortification = 1 saved unit? or 1 blocked sword?
e.g.. Gregor Clegane victory vs Ser Rodrick Cassel who has 2 units, do the 2 fortifications rescue the 2 units or does 1 of them still die as 2 swords are stopped but he still has a third?
If I understand correctly the Fortifications cancel out one Sword per. So if you have three swords versus two fortifications then one unit would still die.