What if the Battle of Qadisiyyah Had a Different Result

The battle of Qadisiyyah was fought in 636 CE from November 1-4. The battle is not known well in Western history but it had major implications for the West and much of the globe. This was a battle where the Arab armies, newly converted to Islam, were able to defeat the Sasanid Persian Empire. The result was the conquest of what is now Iraq and eventually Persia, allowing the new Islamic Empire to emerge in the Middle East and, eventually, expand to other areas.

The Historical Circumstances

In 636 CE, there were two major universal religions, which were Christianity and Zoroastrianism. These faiths were supported by the two major superpowers of the Middle East, which were the Byzanitine and Sasanian Empires. Both these powers seemed invincible and held much great wealth. However, by the early 7th century CE, major wars across the Middle East devastated much of the region and led to both these empires to deplete their resources.

In 636, Caliph Umar had re-invaded Iraq, after a previous Muslim army was defeated and removed from the region. The Sasanian and Arab armies met at the village of Qadisiyyah, southwest of the modern city of Hilla in Iraq, which is near ancient Babylon. The battle was mostly fought by a relatively inexperienced Arab army; however, much of the Persian army was also inexperienced, as many of their best troops had died or were depleted from previous engagements. This made the two sides relatively even and after the first day of the battle it did not seem that either of them could break each other's defenses. A key turning point was Arab reinforcements that strengthened the Islamic army, who were much more professional soldiers and well trained, and that arrived at the battle of Qadisiyyah on the second day. These numbered about 5000 and proved to be the difference in allowing the Arabs to breakthrough the Persian main line, causing them to routed and forcing the main Persian force to retreat. By the fourth day of the battle, the outcome was clear and the Sasnian army fled to the north, although many were killed as they attempted to flee.

The key outcome came after the battle. First, a large amount of booty was captured from the Sasanian army. This helped finance later battles and the Muslim army to further march north. The next major defeat for the Sasanians was at their capital Ctesiphon, where their capital was captured after a two month siege. In 650, a new phase of invasions was then ready, leading to the conquest of Persia and defeat of the Sasanian Empire.

Implications of the Battle

Typically, the fall of one empire, in this case the Sasanian, and rise of another, the Islamic Empire, which became the Umayyad and later Abbasid Empire, as well as spawning other states, would not be that different from other succession of empires that was typical in the 1st millennium CE. However, the battle at Qadisiyyah and subsequent conquests it enabled allowed many social changes to occur that proved to spread to many regions.

First, the fall of the Sasanians, which became more inevitable after the battle, meant that the once widespread Zoroastrian religion began to fade and many adherents eventually converted to Islam. In effect, it allowed one religion to be mostly replaced by another. Although this process occurred over a long period, the events at Qadisiyyah paved the way for this to accelerate.

Second, the defeat of the Persians paved the way for major Arab migrations to Iraq and more fertile regions of the Middle East. Although Arabs were present before in many towns and cities in the Middle East, this now meant the Arabic language started becoming more prominent as migrants came to different regions. With the use of Arabic in Islam, it cemented the spread of this new common language to be widespread across not only the Middle East but it soon spread to Iran and west to North Africa.

Third, the battle gave the Islamic armies a lot of confidence and experience. This led to much more rapid gains in the Middle East and North Africa against the Byzantines, although they were never ultimately defeated by the Arabs. The success even carried on in Europe, where they were only finally defeated in France by Charles Martel in 732. Between 646 and 732, the Arab armies had almost been unstoppable in open battlefields, although sieges of great cities, such as Constantinople, gave them more difficulty.

One of the great results of the battle was the Arab armies were now in a position to benefit from the technical and infrastructure built by the Sasanians in the region of Iraq. This allowed them to build using new technical capabilities they acquired and developed using Persian science. Furthermore, scholars who were based in Persia, who had come from many parts of the ancient World, including Greece and India, now were employed by the Arabs. This allowed not only the great Gold Age of Arab science and philosophy to be possible, but it also allowed much of the lost knowledge in Europe, after the collapse of Rome, to be copied by the Arabs. This knowledge was then transferred back to Europe in the Medieval period, eventually leading up to the Enlightenment that allowed a new period of discovery to emerge in Europe.

Alternative Possibilities

If the battle resulted differently, where the Muslim armies could have been routed, then one possibility would be that Islam and the Islamic Empire would have found it harder to expand outside of Arabia. If the Sasanians were able to hold to their power then it would have been difficult for another major rival power to emerge in the Middle East. In effect, the Sasanians had to be defeated for the Islamic Empire to expand and for Islam to spread.