Battle of Thermopylae (Earth-5875)

The Battle of Thermopylae was a battle fought between an alliance of Ancient Greek city-states, led King Leonidas I of Sparta, and the Persian Empire of King Xerxes I over the course of three days, during the second Persian invasion of Greece. The Spartans were almost all killed during the battle, but their teamwork and courage inspired other Greeks.

History
The SPARTAN-IIs were taught about the battle during one of their first days of training by the Auton synthetic Déjà. The battle is engraved in the knowledge of every SPARTAN-II, such as John-117.

Trivia

 * Battle of Thermopylae on Wikipedia.