Jedok geom or Admiral sword or Commander sword is the name of sword-skill introduced by the Chinese commander Li Rusong

Li Rusong

Li Ru-song was a Chinese general of Ming empire who is from the town of Tieling , LiaoDong Li Ru-song (1549–1598) was a Chinese general of Ming empire who is from the town of Tieling (Chinese:鐵嶺衛), LiaoDong Li Ru-song (1549–1598) was a Chinese general of Ming empire who is from the town of...

 who fought during the Imjin waeran on Korea's side against the Japanese. Li Rusong was of Korean descent.

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

Muyesinbo

The Muyesinbo is Korean martial arts manual published in 1759. The book is a revision of the older Muyejebo and adds twelve methods of both armed and unarmed fighting to the original six which were descbribed in the Muyejebo...

, a martial arts manual from the Joseon Dynasty

Joseon Dynasty

Joseon , was a Korean state founded by Taejo Yi Seong-gye that lasted for approximately five centuries. It was founded in the aftermath of the overthrow of the Goryeo at what is today the city of Kaesong. Early on, Korea was retitled and the capital was relocated to modern-day Seoul...

.