Gapja Literati Purge
Yeonsangun killed many officials linked to the death of his mother, the deposed Queen Yun; his tyranny led to his overthrow two years later.

Tombus20032000 · CC BY-SA 4.0 · Source
Seongjong’s queen, Lady Yun, was deposed in 1479 and forced to take poison in 1482. Told the full story by Im Sa-hong and others, Yeonsangun in 1504 punished everyone connected — ministers and Sarim alike who had taken part in, or failed to stop, the decision. Kim Goeng-pil and others were killed, and the corpses of Han Myeong-hoe and Jeong Yeo-chang were exhumed and mutilated. This time the old guard suffered heavily too. Yeonsangun went on to abolish the royal lectures and the Office of the Censor-General and, over anonymous letters written in Hangul, banned its use.
