Hercules fought the Nemean Lion as one of his twelve labors. This lion was invulnerable to weapons, requiring Hercules to strangle it in a display of immense strength. After defeating the lion, Hercules wore its impenetrable skin as armor, symbolizing his victories and trials. This labor demonstrated not only physical prowess but also the importance of courage in facing challenges, establishing Hercules as an enduring symbol of strength and heroism in ancient mythology.