Not since the Battle of Badr had the Islamic world stood face to face with extinction as it did at the Battle of Ayn Jalut. Just as the Prophet had triumphed at Badr 600 years earlier, the Mamlukes triumphed over the combined armies of the Mongols, the Crusaders and the Armenians at the Battle of Ayn Jalut. The Muslim world survived by a margin that was as small as any allowed by history to any...

For a brief moment, towards the end of the 12th century, the Muslim world was politically united under one caliph ruling from Baghdad. This political unity, rare in Islamic history, projected itself on the military plane. In West Asia, the Crusaders were ejected from Palestine, Lebanon and Syria. Salahuddin recaptured Jerusalem in 1187. Four years later, in 1191, Muhammed Ghori of Ghazna...

The triumphant advance of Muslim armies across the inter-connecting landmass of Asia, Europe and Africa brought into the Islamic Empire large masses of people who were previously Christian, Zoroastrian, Buddhist or Hindu. Conversion to the new faith was slow. The conquering Muslims left the people of the territories alone as long as they paid the protective tax, jizya and did not interfere with...