The ancient Greek city-state known for its military prowess and discipline was Sparta. Renowned for its austere lifestyle and rigorous training, Spartan society prioritized military excellence and strength. Boys entered a state-sponsored education system known as the Agoge at a young age, focusing on combat skills, endurance, and obedience. The Spartan army was highly respected for its training and effectiveness, particularly during battles like the Battle of Thermopylae against the Persian Empire. Spartan culture valued resilience, loyalty, and discipline, which shaped its citizens and contributed to its reputation as one of the leading city-states of ancient Greece.