Jedok geom

Jedok geom or "Admiral sword" or "Commander sword" is a sword-skill introduced by the Chinese commander Li Rusong who fought during the Japanese invasions of Korea during the 16th century. Li Rusong was from Hebei province, China. 
Technique.
The techniques required the use of both a sharp sword and a waist sword. Li used straight-bladed swords (jikdo) with a single edge for slashing and a double-edged sword (geom) for stabbing. The techniques, with 14 basic stances, were first published in the Muyesinbo, a martial arts manual from the Joseon Dynasty.