sentences:  1923 Bulgarian coup d'état
  
  The 1923 Bulgarian coup d'état, also known as the 9 June coup d'état (, "Devetoyunski prevrat"), was a coup d'état in Bulgaria implemented by armed forces under General Ivan Valkov's Military Union on the eve of 9 June 1923.Hestitantly legitimated by a decree of Tsar Boris III of Bulgaria, it overthrew the government of the Bulgarian Agrarian National Union headed by Aleksandar Stamboliyski and replaced it with one under Aleksandar Tsankov.