Escape: An equivalent of the withdrawal chance, but on defense. Out of gameplay reasons it would be much better to drop the realism a bit. It would result in the defender staying where he is and the attacker withdrawing from victorious combat without killing the enemy unit and leaving it only with little (but getting still full XP). For naval units it would be completely linked with withdrawal chance. Withdrawal chance = Escape chance. But for land units it would be developed with a separate upgrade. Withdrawal chance <> Escape Chance. Mounted and Armor units would have escape chances given as a special ability, but no upgrade to enhance it. Infantry would mostly develop it from a Drill II requiring upgrade "Discipline" +30% escape chance. Naval units would be eligible for it, but it would only improve both bonuses by 15%. Furthermore, a unit that has successfully used this ability or has less than one :movement: left has its chances halved. The question how to have the subs nerfed now is open, the easiest solution is to have their escape/withdrawal base bonus decreased to 30% leaving them still as a very interesting weapon(and much more realistic: quite easy to neutralize and force into hiding, hard to hunt down and kill).