Leonidas I vs Meng Tian

Leonidas became one of the two kings of Sparta, likely succeeding his half-brother Cleomenes I. As a member of the Agiad dynasty, he assumed command of the Spartan army and played a key role in Spartan foreign policy during the Persian invasion.

Leonidas led a small Greek force, including 300 Spartans, against the invading Persian army under Xerxes I at the pass of Thermopylae. The Greeks held for three days before being outflanked. Leonidas and his contingent were killed, but the stand became a symbol of Greek resistance.

Leonidas commanded the allied Greek forces at Thermopylae. He chose to remain with the rearguard after learning of the Persian flanking maneuver, leading to his death along with his 300 Spartans and other Greek volunteers. The sacrifice delayed the Persian advance.

Meng Tian led a Qin army to defeat the Xiongnu, driving them out of the Ordos region. This victory secured the northern frontier and allowed for the expansion of Qin territory.

Meng Tian oversaw the construction and reinforcement of the Great Wall of China, connecting and extending existing walls to defend against northern nomadic tribes. This project involved hundreds of thousands of laborers.

Meng Tian supervised the construction of the Straight Road, a 700-kilometer highway connecting the Qin capital Xianyang with the northern frontier. This road facilitated military movement and communication.

After the death of Qin Shi Huang, the eunuch Zhao Gao conspired to have Meng Tian forced to commit suicide. Meng Tian complied, despite his loyalty to the Qin dynasty. His death weakened the dynasty's northern defenses.