As the art of Taekkyon was popularized in Koguyo, it was also handed down to Silla, which is justified by the following points of view;

(1) "hwarang"(or sonrang) in Silla has the same meaning with the word "sonbae" in Koguryo by indicating both       theyouth warrior's corps from their etymological origins
(2) Both hwarang and sonbae had the same organizations and hierarchical structure with each other.
(3) According to historical, as sonbaes in Koguryo used to compete in Taekkyon games at the time of their national       festivals, hwarangs in Silla also played

at such festivals as "palkwanhoe" and "hankawi" , thus systematically developing the ancient fighting techniques into the Taekkyon(or sonbae) as the basis of martial arts by around A.D.200. From the 4th century the hwarangs took the takkyon lesson as a systmeized martial art at their learning houses to make it also popularized among ordinary people so much so that their techniques were depicted on the mural paintings of ancient warrior tombs. 

Again, it is also true that Taekkyon, coming down to Silla, was further developed into a school of martial art with the division of techniques, i, e. bare-hand techniques and foot techniques, which can be proved by the fact that both hand and foot techniques are clearly shown in the ancient sculptures of buddhistic statues.