Realm V6 258, date 04.02.2015 22:41. nick.slotter (me) vs slime2015. At htis time army moral jump from 81 to 107 but ALL Swardsmen and Cavalry died. I think this is impossible, must be some bug. Later I won him with less army!
You managed to destroy the fortress in round 12, but all swordsmen, cavalry and rest of the battering rams fled due to a low morale (39 points) in the same round. Your archers continued the battle against the units in the fortress but they also fled due to a low morale (37 points) after 10 rounds of fighting and you lost the battle. The data in the report by rounds means they left, they weren't killed, and the value of 107 morale shown in round 13 is the morale of the archers who were the only one left on the battle field.
Lazyguyzz, similar situation happened with your battle too, the army destroyed the fortress in the 10th round, but the first line consisted of swordsmen, cavalry and battering rams fled due a low morale (42 points). The archers continued the battle against the garrison army and they also fled from the battlefield at 19 morale. The units weren't all lost.