Audio:
QuocDung1604: https://commons.wikimedia.org/wiki/File:National-anthem-north-korea_ogg.ogg
Pictures Requiring Attribution:
Shizhao: https://en.wikipedia.org/wiki/File:Changbai_hotspring.JPG
lienyuan lee: https://commons.wikimedia.org/wiki/File:Chanbaishan_%E9%95%B7%E7%99%BD%E5%B1%B1_-_panoramio.jpg
Wang65: https://commons.wikimedia.org/wiki/File:Changbai_shan_2009.JPG
王凤云: https://commons.wikimedia.org/wiki/File:Q14210850%EF%BC%885%EF%BC%89.jpg ; https://commons.wikimedia.org/wiki/File:Q14210850_%EF%BC%882%EF%BC%89.jpg
Raju Jangid: https://commons.wikimedia.org/wiki/File:Grain_millet_2.jpg
Rickinasia: https://en.wikipedia.org/wiki/File:Dangun_statue_near_Daecheong_Dam_-_%ED%86%B5%EC%9D%BC%EA%B8%B0%EC%9B%90%EA%B5%AD%EC%A1%B0%EB%8B%A8%EA%B5%B0%EC%83%81.jpg
Galdrad: https://commons.wikimedia.org/wiki/File:Korea_(400_BC).png
Li Chao: https://commons.wikimedia.org/wiki/File:China_blank_map_grey.svg
Windmemories: https://commons.wikimedia.org/wiki/File:White_Horse_Temple_01.jpg
Reignsh: https://commons.wikimedia.org/wiki/File:%EA%B3%A0%EA%B5%AC%EB%A0%A4_19_%EA%B4%91%EA%B0%9C%ED%86%A0%ED%83%9C%EC%99%95_546.jpg
Lawinc82: https://commons.wikimedia.org/wiki/File:Chungju_Goguryeo_Stele.JPG
Yug: https://en.wikipedia.org/wiki/File:China,_610.svg
SY: https://en.wikipedia.org/wiki/File:Tang-Korean_wars.png
KJS615: https://en.wikipedia.org/wiki/File:History_of_Korea-Later_three_Kingdoms_Period-915_CE.gif ; https://commons.wikimedia.org/wiki/File:History_of_Korea-Goryeo_Period-1389_CE.gif
Gabagool: https://commons.wikimedia.org/wiki/File:MongolEmpireDivisions1300.png
Uconhe: https://commons.wikimedia.org/wiki/File:%EC%97%AC%EC%88%98_%EB%AF%BC%EC%A1%B1%EC%9D%98%ED%83%9C%EC%96%91.jpg
Ian Kiu: https://en.wikipedia.org/wiki/File:Jin_Dynasty_1141_(no_borders).png
Lance Vanlewen: https://en.wikipedia.org/wiki/File:Hwaseong_Fortress,_Suwon,_Gyeonggi-do,_Republic_of_Korea_(2).jpg
KIMJUNGWOOK: https://en.wikipedia.org/wiki/File:%ED%99%94%EC%84%B1_%ED%96%89%EA%