Jisho

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Wikipedia definition
1. Border Defense Council of JoseonBorder Defense Council of Joseon(비변사, 備邊司) is the supreme administrative organ since mid-Joseon whose other names were like Biguk or Joosa. The council took alternative initiative instead of Uijeongbu,State Council of Joseon, distinctively after the twice invasion from Japan and from Mongolians.
Read “Border Defense Council of Joseon” on English Wikipedia
Read “備辺司” on Japanese Wikipedia
Read “Border Defense Council of Joseon” on DBpedia

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