Oh the madness of battle! We fear it, we celebrate it, the poets sing of it, and when it fills the blood like fire it is a real madness. It is joy! All the terror is swept away, a man feels he could live for ever, he sees the enemy retreating, knows he himself is invincible, that even the gods would shrink from his blade and his bloodied shield. And I was still keening that mad song, the battle song of slaughter, the sound that blotted out the screams of dying men and the crying of the wounded. It is fear, of course, that feeds the battle madness, the release of fear into savagery. You win in the shield wall by being more savage than your enemy, by turning his savagery back into fear.