How Islam Swallowed Up Christendom
On August 20, 636, the most consequential battle in world history took place: the Battle of Yarmuk. Not only did it decide whether the Arabian creed would thrive or die, it became a source of inspiration and instruction for jihadists throughout the centuries — right down to the Islamic State, or “ISIS.” Yet very few in the West are even aware of this battle, much less its influence on modern jihad. The story begins with the Prophet of Islam. In 632, Muhammad died, having united the Arabs under Islam. Afterwards, some tribes refused to pay taxes, or zakat, to the caliph Abu Bakr. Branding them apostates, the caliph launched the Ridda (“apostasy”) Wars, in which tens of thousands were beheaded, crucified, or burned alive. By 633, these wars ended, and in 634, Abu Bakr died. It fell to the second caliph, Omar bin al-Khattab (r. 634–44), to direct the united Arabs against “the infidel.” Thousands of Arabs quickly flooded into Christian Syria, slaughtering and plundering in the name of jiha...