Gyeongju is strongly associated with the education tradition of Hwarangdo ("Way of the Flower of Young Men") which was established and flourished during the Silla period. It is a military and philosophical code that offered the basis of training to Hwarang, a military cadet of youths from the aristocratic class. The training equally emphasized practicing academic and martial arts based on Buddhism and patriotism. A number of Silla's greatest generals and military leaders such as Kim Yu-sin were Hwarang who played a central role in Silla unification of the Korean peninsula. As Silla was integrated into the next ruling dynasty, Goryeo, the system declined and was officially disbanded in the Joseon dynasty. However, the spirit and discipline were revived in the second half of the 20th century as a form of Korean martial arts with the same name.