Another example of such overlap is readily found in contemporary South Korea. The southwest provinces of North and South Jeolla were the core of the ancient state of Baekje that disappeared in 660 CE, at the hands of its rival to the east, Silla, based in the current Gyeongsang provinces. The border between the two -- the Seomjin River -- still marks a striking linguistic, culinary, and political boundary between the more progressive Jeolla and conservative Gyeongsang.