Claim: ROKS Cheonan was a Pohang-class corvette and on 26 March 2010, she broke in two and sank near the sea border with North Korea killing 46 sailors.
Evidence: ROKS Cheonan (PCC-772) was a Pohang-class corvette of the Republic of Korea Navy (ROKN), commissioned in 1989. On 26 March 2010, she broke in two and sank near the sea border with North Korea, killing 46 sailors. 
Pohang-class corvette Sunk on 26 March 2010 at The same day, the Joint Chiefs of Staff of South Korea said that one body of the 46 missing sailors had been found. Later on 3 April 2010 South Korea called off the rescue operation for the missing sailors, after families of the sailors asked for the operation to be suspended for fear of further casualties among the rescue divers. Cheonan's captain, Commander Choi Won-il, said that the ship broke into two and the stern sank within five minutes after the explosion and while he was still assessing the situation.