The Turks forced their way onto the world stage with thunderous momentum. Their galactic advance is marked by three critical events that provide historic benchmarks: the hiring of a Turkish guard by the Abbasid Caliph al Mu’tasim (833); the disappearance of the Samanid State based in Bukhara (999); and finally, the Battle of Manzikert (August 1072). After Caliph al Mu’tasim, the...

A divided Islamic world offered feeble resistance to the Crusaders who consolidated their hold on the eastern Mediterranean and imposed their fiefdoms on the region. The Seljuks, preoccupied with defending their eastern flank against the Afghan Ghaznavids, had thinned out their western defenses. The pagan Turkish tribes across the Amu Darya on the northeastern frontiers were a constant menace....