Vazrazhdane MP Ivelin Parvanov recalled the dark events related to the military coup of June 9, 1923, when the government of Alexander Stamboliiski was ousted from power. Parvanov pointed out that the reason for the coup was Stamboliiski's idea to hold accountable the politicians responsible for the national catastrophe after World War I and the signing of the nation-destroying Treaty of Neuilly. 

In the early hours of 9 June 1923, a military coup was carried out in Bulgaria against the government of Alexander Stamboliiski, who was captured and killed in a particularly cruel manner by representatives of the Internal Macedonian Revolutionary Organisation (IMRO). The coup was carried out with the backing of the Tsar, the opposition, the officers and IMRO.  

At the head of the country stood prof. Alexander Tsankov, known by his nickname "The Bloody Professor". He is responsible for the deaths of many journalists, progressive-minded writers and public figures, including poet-publicist Geo Milev and journalist Joseph Herbst, who exposed the political repression following the coup and the subsequent communist uprising in Bulgaria in 1923, known as the September Uprising. 

The brutal political persecution of opponents of the Bloody Professor's rule became the occasion for many foreign observers to describe Tsankov's cabinet as "the most terrible and unscrupulous government in Europe".