following a rebellion led Hercules,he is instructed to preform"Ten Labours" or deeds for king Eurystheus of of Argos and act as his servant. The he first of these labours was that of the Nemean lion.
There was a place callde Nemea,which was being troubled by a giantn lion that couldnt be pierced by a sword or spear. Eurystheus orders Hercules to go and kill this monster. Hercules goes to Nemea, finds the lion,and strangles it to death.
(you dont need a sword when your Hercules.) After he kills the lion, Hercules skins it and wears its hide as a cape.(This turns out to be Hercules signiture look; he wears his trusy lion skin cape for the res of his life.)