A referendum on the prosecution of war criminals was held in Bulgaria on 19 November 1922. It was approved by 74.33% of voters.
Bulgarian war criminal prosecution referendum, 1922 Wikipedia
The ruling Bulgarian Agrarian National Union sought to prosecute members of the cabinets of the governments led by Ivan Evstratiev Geshov, Stoyan Danev and Aleksandar Malinov for war crimes committed during World War I. On 24 September 1922, 17 of the 22 ministers were arrested, and a law on prosecution was published on 17 October.