The tactical situation was straight-forward. The outnumbered Midrealm force had no hope of victory, but by standing firm on the high ground they could force the Eastrealm to charge uphill. In such a situation the Midrealm would be able to inflict greater casualties than on level ground. The outcome would not change, but the victory would prove more costly to the East.
Moonwulf took in the situation, pointed to the Eastern lines below and said to his Earl Marshal, "There's the short road to glory". He then charged down the hill, with his band of warriors at his heels.
Moonwulf of course died like a bug, as did the remainder of his force. History does not record who slew Moonwulf in his charge; who really cares? The fact worth recording is that Moonwulf charged, not that he fell.
Borrowed with respect from Hector of the Black Height's On the Mechanics of the Bardic Arts within the SCA