The Sacred Band of Thebes was an elite Greek troop of 150 pairs of homosexual lovers, according to Plutarch formed by Gorgidas. The motivation for the use of such an "Army of Lovers" in battle is also stated by Plutarch:

"For men of the same tribe or family little value one another when dangers press; but a band cemented by friendship grounded upon love is never to be broken, and invincible; since the lovers, ashamed to be base in sight of their beloved, and the beloved before their lovers, willingly rush into danger for the relief of one another."

According to Plutarch, Gorgidas initially distributed the Sacred Band of Thebes throughout his battle lines as an elite to strengthen the others' resolve, but later Pelopidas, after the Band had fought successfully at Tegyrae, used it as a sort of personal guard.

For about 33 years, the Sacred Band of Thebes remained an important part of the Greek infantry. Its defeat came at the battle of Chaeronea, when it was overcome by Philip II of Macedon and his son Alexander the Great in the decisive battle that ended Greek independence of the city-states.

Plato wrote about the code of honor of the Sacred Band of Thebes:

"The beloved, when he is found in any disgraceful situation, will be pained at being detected by his lover. If there were only some way of contriving that a state or an army should be made up of lovers and their loves, they would be the very best governors of their own city, abstaining from all dishonour... For what lover would not choose rather to be seen by all mankind than by his beloved, either when abandoning his post or throwing away his arms... Or who would desert his beloved or fail him in the hour of danger?"