Forces of a kingdom based in this region destroyed a dam in order to defeat the Sui dynasty at the battle of Salsu River.
Forces of a kingdom based in this region destroyed a dam in order to defeat the Sui dynasty at the battle of Salsu River. A king from this region created the Hall of Worthies. An admiral from this region used "turtle ships" to win battles like Noryang Point. This region was home to Silla, Baekje, and (*) Goguryeothe Three Kingdoms. Admiral Yi Sun-sin led forces in repelling the invasions of Toyotomi Hideyoshi during the rule of this region's Sejong the Great-led Joseon dynasty. Sejong created a new alphabet for this region's native language, Hangul. For 10 points, identify this peninsula once ruled entirely from Seoul.
Forces of a kingdom based in this region destroyed a dam in order to defeat the Sui dynasty at the battle of Salsu River.
Korea [or Daehanminguk; or Hanguk; accept Joseon before it's mentioned]