What is the agoge? I already suspect it is Sparta's education system ...

It was a rigorous education and training program mandated for all male Spartan citizens It was made to cultivate loyalty, learning stealth, It was pretty near to impossible military training

Answer: The agōgē was the rigorous education and training program mandated for all male Spartan citizens, except for the firstborn son in the ruling houses, Eurypontid and Agiad. The training involved cultivating loyalty to the Spartan group, military training, hunting, dancing, singing, and social preparation. The word "agoge" meant rearing in ancient Greek, but in this context generally meant leading, guidance, or training.