By Patrick J. Buchanan

Arguably the most successful act of revolutionary terror was the June 1914 assassination of the Archduke Francis Ferdinand in Sarajevo.

Believing his mission to murder the heir to the Austrian throne had failed, Gavrilo Princip suddenly found himself standing a few feet away from the royal car. He fired twice, mortally wounding the archduke and his wife.

Tactically, that act of terror eliminated the reformist Ferdinand, who meant to address the grievances of his Slav subjects by granting them greater autonomy and equality with Austrians and Hungarians inside the empire.