Records of the Border Defense Council

Records of the Border Defense Council of Joseon or "Bibyeonsa Deungnok"(in Hangul:비변사등록) is the records of the Border Defense Council during Joseon dynasty, consisting of 273 books. The council was in charge of legislating important state affairs, which, exactly to put, was actually temporary bureau in terms of national security in early 16th century, after Japanese invasion in 1592. As the scope and the invasion became wider and more often in the era of Jungjong, the establishment of the Council officially was guaranteed and later expanded to broader scope. The council later became the supremest organ to address overall state affairs.
Records.
As the council concerned almost every single sector of affairs since mid-Joseon, the records share highly important value in terms of legislative processes, politics and history of Joseon.
Generally, the Border defense council published one annal each year, while depending on several incidents, the annals can be more than two. The starting date of publishment remains not sure, however. The most convincing period when the records might officially start is in 1555 - official establishment of the council. Under the assumption, the perfect remnants of the records should be 276 books until 1892. 54 years' records does not exist in the current time.
The title of each year's record is not always consistent, depending on incidents occurred in each year. Each annal firstly recorded the era of the King, the date and the member of the discussion in each month's council and then, the contents could be published. Therefore, the reader can find out what kinds of incidents happened and how the council legislated the aftermaths.
Additionally, the records include diverse description regarding society and economy of Joseon - the books of 250 in the formation of supplements to the book. These annals are highly appreciated information in terms of socio-economical stance and transition in the mid and late Joseon. The original publication belongs to Gyujanggak. In 1959-60, the Korean History Committee re-published the full annals into 28 pieces, while the finalized translation into Hangul was finished in 2010.