SKorean island prepares for attack from North South Korea-controlled island of Yeonpyeong in the Yellow Sea was shelled by North Korea in 2010, and nervous residents are hunkering down for another possible attack from the North and South Korean Marines have set up anti-aircraft gun positions. The Korean peninsula has been engulfed by escalating military tensions and dire threats of nuclear war ever since North Korea conducted a rocket test last December and a nuclear test in February. Images.