The Battle of Tegyra in 375 B.C. proved that the legendary Spartan army could be defeated.
A thousand Spartan soldiers, trained for combat from the age of 7, were returning from an expedition when they stumbled on a much smaller force from the rival city of Thebes. Rather than retreat, the Theban infantry charged, pulling into a close formation and piercing the Spartan lines like a spear. The Spartans turned and, for the first time ever in pitched battle, fled.
