A foreign invasion of it by Toyotomi Hideyoshi lost at the battle of Noryang with the help of this country's turtle ships.
The Silla dynasty ruled in this country where Sejon the Great was an early ruler of the Choson Dynasty. A foreign invasion of it by Toyotomi Hideyoshi lost at the battle of Noryang with the help of this country's turtle ships. One war in this country featured a landing by Douglas Macarthur at Inchon, which led to its 38th-parallel demilitarized zone. For 10 points, name this peninsula split into a northern half ruled by Kim Jong-Il and a southern half with capital Seoul.
The Silla dynasty ruled in this country where Sejon the Great was an early ruler of the Choson Dynasty.
{Korean} Peninsula [accept {Hanguk}; accept {Choson} before mentioned]