This kingdom temporarily banned marriage of teenage girls to supply the Mongols with “tribute women,” including Toghon Temur’s wife Oljei Kutuk. During a Mongol invasion of this non-Russian kingdom, the general Sartaq resorted to using firebombs made of human fat in a failed siege. The Three Elite Patrols rebelled against this kingdom, which was deposed by a general who refused orders and “turned back the army” at (*) Wihwa Island. After one of the many invasions of this kingdom by the Mongols, its monks re-carved an edition of the Tripitaka on 80,000 woodblocks. The arak brought by Yuan Dynasty invaders (-5[1])of this kingdom became the basis for the drink soju. For 10 points, name this medieval kingdom whose name is the source for the modern word “Korea.” ■END■ (10[1])