"Native Sword Methods" (K. "Bon Kuk Geom Beop" - 본국검법) is first identified in Korean legends of the Kingdom of Silla, one of the domains comprising "The Three Kingdoms" Period (37 BC – 660 AD). The "Yuji Sungnam" relates a story of a seven-year-old boy from the Silla Kingdom who traveled across the Kingdom of Paekshe, demonstrating his "sword dance" ("gummu") and drawing large crowds. However, when finally summoned to perform his dance before the king, the boy ended his performance by plunging his sword into the king, killing him, and was, in turn, cut down by the king's retainers. In honor of the young boy's sacrifice, the Silla people created a masked sword dance resembling the boy's face.