Like flaming demons, Wallachians rushed out of the night and into the Turkish camp, striking terror in an army of terrorists. Leading the charge was a gore-spattered chieftain—hewing and hacking a path to the central tents where the Sultan huddled in fear. On he came, Vlad Dracul, raining down slaughter and raging for Mehmed’s blood.On June 17, 1462, outside Targoviste, Romania, the world was given a rare instance of how the good can be accomplished though the grotesque—for God can deploy His enemies as allies. Vlad Dracul III, Prince of Wallachia, can hardly be considered a warrior of faith; but...