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Goryeo was invaded because of the Mongols in 7 important campaigns in the 1230s until finally the 1270s, but was under no circumstances conquered.[117] Fatigued just after decades of fighting, Goryeo sent its crown prince towards the Yuan money to swear allegiance for the Mongols; Kublai Khan approved, and married considered one of his daughters to your Korean crown prince,[117] as well as dynastic line of Goryeo ongoing to outlive underneath the overlordship of your Mongol Yuan dynasty as a semi-autonomous vassal state and Obligatory ally.

South Korea has two volcanic islandsJeju, from the peninsulas southern tip, and Ulleung, about eighty five miles (one hundred forty km) east of your mainland inside the East Seaand a little-scale lava plateau 슬롯솔루션 in Gangwon province.