Austria did nothing to allay this fear; she stood as a Teutonic bulwark between a growing Slavic menace (in Serbia and Montenegro) on the south and the already formidable Slavic menace (Russia) on the east. In her provinces of Bosnia and Herzegovina, which were transformed from protectorates to integral parts of the Austrian Empire in 1908, there dwelt thousands of peasants who were of Serbian nationality; in more concise terms they were of the same racial stock as the Serbians. After Serbian prestige rose as a result of the Balkan Wars of 1912 and 1913 these Serbian subjects of Austria desired more than ever to be a part of the Slav kingdom; this desire was shared by the leading factions in Serbia itself; the doctrine of "Greater Serbia" demanded that the aims of the desire be materialized. Besides, the "natural boundaries" of Serbia seemed to take in the greater part, if not all, of Bosnia and Herzegovina, for they stretched along the eastern shores of the Adriatic and shut Serbia and Montenegro off from that sea. Propaganda began to spread throughout Serbia and Bosnia and Herzegovina, reminding the Serbs in all three places that they must work to bring themselves under one government, and that government their own; they were urged to keep up their efforts to standardize their religion, their speech, their traditions; they were called upon, by this same propaganda, to substitute Austria for Turkey as the object of national Serbian hate. But Austria, too, had the disease of Nationalism, and she had been engaged since 1908 in "ironing out" the Serbs within her borders. Thus great friction was engendered, and when, on June 28, 1914, the Archduke Francis Ferdinand, the crown prince and his morganatic wife visited the Bosnian city of Sarajevo, they and the officials of the city and province knew that the lives of the pair were in danger from Serbian intrigue. The archduke had gone to Bosnia on his first visit to take charge of military maneuvers there, and before he left the Austrian capital the Serbian minister had expressed doubt as to the wisdom of the visit, telling the court that the Serbian population in Bosnia might make unfavorable demonstrations. The fears of the Serbian minister proved to be well founded; Sarajevo displayed many Serbian flags on the day of his arrival. The archduke's party, in automobiles, proceeded to the Town Hall after leaving the railway station, passing through crowded streets. The city officials were gathered at the Town Hall to give him an official welcome. A bomb, hurled from a roof, fell into the archduke's car; he caught it and threw it to the pavement, where it exploded, doing no damage to either him or his wife, but injuring two adjutants in the car following. One Gabrinovics, a Serbian from Trebinje, was arrested as the assailant.