There was a brave and selfless knight His armour shone, exceeding bright And sworn he was, for all his days To do what he thought right
When once, upon a whim, he took A shortcut βround a little brook He came upon a pretty maid And promise he forsook
For came a dragon through the field The knight his mighty blade did wield The worm, with flaming wings unfurled Crashed hard against his shield
Escaped the knight into the wood When save the girl, only he could For life he deemed more precious, there Than doing what he should
The dragon ceased her attack, when Pursued by braver knights and men She turned, at bay, and died to save The young ones in her den
Judge not the greatest nor the least Until you see the soul in deeds But now decide, of these two, which Was nobler... man or beast?
An aegis is an ancient greek type of shield. If someone's aegis was shattered in battle, his brothers-in-arms would protect him from the enemy with their own shields. Someone under such protection was said to be "under the aegis" of his friend. Over time, the word evolved to mean literally both the shield itself and the idea of protection in general.