Relations between the two Koreas have been strained in recent years, with provocative actions taken under the rule of Kim Jong-il (such as the suspected torpedoing of the ROKS "Cheonan" and the bombardment of Yeonpyeong Island, both in 2010) and his son, Kim Jong-un (such as the rocket launches in April and December of 2012 and North Korea's third nuclear test in 2013). Kim Jong-un's sudden accession and limited experience governing have also stoked fears about power struggles among different factions leading to future instability on the Korean Peninsula.