The national classic " The collection of Paek Sa " is a collection of works of Ri Hang Bok (1556-1618) who was a feudal bureaucrat and literary man and it contains military data related to the period before and after the Imjin Patriotic War.
First of all, in it was described the data of the Japanese aggressors who had invaded our country in 16th century.
“The collection of Paek Sa " reflects the measures for bolstering up the country's defence capability. Among the measures was a suggestion to rationally deploy the armed forces of the naval force and thus strengthen the coastal defence of the country.
It also deals with the issue of bolstering up the military force by stepping up the manufacture of weapons in the early 17th century.
Ri Hang Bok also proposed at the palace that the money used for the luxury and dissipation of the nobles should be transferred to military service to make weapons.
As seen above, the national classic " The collection of Paek Sa " is of great value in the history of the struggle against invaders in the Middle Ages and in the study of military data related to the military affairs of our country, as it reflects the invasion of the Japanese imperialists against Korea in the latter half of the 16th century and early in the 17th century, the activities for strengthening the country's military capabilities and the efforts for manufacturing weapons suited to the actual conditions at that time.