Phong Nhị and Phong Nhất massacre

Notes:

The Phong Nhị and Phong Nhất Massacre (source NSFW) was a war crime committed against the villages of Phong Nhị and Phong Nhất by South Korea's 2nd Marine Division (Blue Dragons) in response to being fired upon from their direction.

Like all South Korean war crimes from the Vietnam War, South Korea denies that it ever happened and Vietnam refuses to press the issue in order to maintain good political relations with the South Koreans.