After conducting a criminal investigation, verifying that Germany would honor its military alliance, and persuading the skeptical Hungarian Count Tisza, Austria-Hungary issued a formal letter to the government of Serbia on 23 July 1914. The letter reminded Serbia of its commitment to respect the Great Powers' decision regarding Bosnia-Herzegovina, and to maintain good neighborly relations with Austria-Hungary. The letter contained specific demands that Serbia should accept, including the suppression of the publication of propaganda advocating the violent destruction of Austria-Hungary, the removal of the people behind this propaganda from the Serbian Military, the dissolution of the Serbian nationalist organization Narodna Odbrana, the arrest of the people on Serbian soil who were involved in the assassination plot and the prevention of the clandestine shipment of arms and explosives from Serbia to Austria-Hungary. It also demanded that Austro-Hungarian officials should take part in the Serbian inquiry into the assassination plot.