Leonidas (about 540 ~ 480 BC) also translated Leonidas. Judging from Yakyad's lineage, it is said that he is a descendant of Hercules. He probably won the throne of Sparta after a series of struggles between 490 BC and 488 BC. His wife, Gorgo, was the queen of Sparta in ancient Greece. The heroic performance of 300 Spartan soldiers led by him in the Second Bo Shi War made him a hero of ancient Greece.

In 480 BC, King Xerxes I of Persia led 300,000 troops to capture the Hot Spring Pass, and Leonidas led 300 Spartan warriors, 900 Shiloh slaves and 400 Thebes, totaling 6,900 people, to reach the Hot Spring Pass first. Xue Xisi attacked Wenquan Pass with tens of thousands of troops, but Wenquan Pass was guarded by one man on the grounds that ten thousand people were invincible. Persian troops suffered heavy casualties for two consecutive days. On the third day, a Greek traitor led the Persian army to the place behind the Hot Spring Pass, leaving Leonidas under attack. Finally, Leonidas led 300 Spartans, 400 Thebes and 700 Tesbians who voluntarily stayed to defend the Hot Spring Pass. The Spartans were fearless and repelled four attacks by the Persian army. The Persian army killed all 300 Spartans and 1 100 Thebes and Tesbia. Leonidas was not spared from the attack of the arrow rain, and Xue Xisi occupied the hot spring pass at a heavy price of 20,000 soldiers killed and two younger brothers killed.

After the Battle of Wenquanguan, 1 10000 Greek troops and 300,000 Persian troops launched the last battle-the naval battle of Salami Bay.

Leonidas and his 300 soldiers were praised by the Greeks for their spirit of defending their positions to the death. At the same time, Xue Xisi paid a heavy price for it.

Leonidas's story was made into an immortal masterpiece "Sparta 300 Warriors" by Warner Bros. Film Company in 2007.