How Christendom defeated the Ottoman Turks. Historian Diane Moczar pulls back the curtain on one of the most important acts in the drama of Muslim aggression against the West: the 500-year-long siege of Europe by the Ottoman Turks. Islam at the Gates chronicles the heroes and villains, the battles and atrocities, the tragic errors and timely miracles, that marked the Ottomans' incursions from Europe's borders to the very heart of Christendom; and afterwards, by the grace of God, their eventual repulsion and final defeat.