If the defender loses, against the element in contact with its front, it's destroyed. If the defender wins against the element in contact with its front, the enemy elements in contact with its flank or rear recoil. If attacking units contact the flank or rear, but not the front, of a defender, it 'turns to face' them at the END of the attacker's movement. Psiloi are less vulnerable to scythed chariots, elephants, and camelry. Auxilia are more vulnerable to scythed chariots.
Knights can charge enemy artillery with less fear.
War Wagons are less vulnerable and more powerful. Knights, warbands, and scythed chariots now must pursue, even if overlapping. Campaigns - Declarations of War are now required, replacements are increased, the 'Conquest' and 'Tributary Rulers' sections are rewritten. The Berbers make peace with the Medieval Irish, fight the Sicilian Normans instead. Early Saxon adds a Middle Anglo-Saxon.