Leonidas, the legendary King of Sparta, is celebrated for his unwavering bravery and leadership during the Battle of Thermopylae in 480 BCE. As the ruler of Sparta, Leonidas led a small force of Spartan warriors, along with allies from other Greek city-states, to defend the narrow pass of Thermopylae against the invading Persian army led by Xerxes I. Known for his fearlessness and sense of duty, Leonidas and his troops fought valiantly against overwhelming odds, holding off the Persian forces for several days. Despite ultimately facing defeat, Leonidas' sacrifice and the bravery of the Spartans inspired future generations, cementing their legacy as symbols of courage and resilience in the face of adversity. Leonidas' leadership and legendary stand at Thermopylae continue to be celebrated in literature, art, and popular culture, embodying the timeless virtues of honor, sacrifice, and heroism.