「第三の五月の虐殺」 refers to a tragic event that occurred in 1980 in Gwangju, South Korea. It involved a violent crackdown by the military against pro-democracy protesters. The uprising began on May 18, when citizens demanded an end to martial law and greater political freedoms. The government responded with force, leading to widespread violence and numerous casualties. Estimates suggest that hundreds, if not thousands, of people were killed or injured during the conflict. This event is a significant part of South Korea's history and is remembered for its impact on the country's democratic movement.