Muslim Conquests And Spread Of Islam
According to traditional accounts, the
Muslim conquests (
Arabic: الغزوات, al-Ġazawāt or Arabic: الفتوحات الإسلامية, al-Futūḥāt al-Islāmiyya) also referred to as the
Islamic conquests or
Arab conquests, began with the
Islamic prophet Muhammad in the
7th century. He established a new unified polity in the
Arabian Peninsula which under the subsequent Rashidun (The
Rightly Guided Caliphs) and
Umayyad Caliphates saw a century of rapid expansion of Muslim power.
They grew well beyond the Arabian Peninsula in the form of a
Muslim empire with an area of influence that stretched from the borders of
China and the
Indian subcontinent, across
Central Asia, the
Middle East, North Africa,
Sicily, and the
Iberian Peninsula, to the
Pyrenees.
Edward Gibbon writes in The
History of the
Decline and Fall of the
Roman Empire:
Under the last of the Umayyad, the
Arabian empire extended two hundred days journey from east to west, from the confines of Tartary and
India to the shores of the
Atlantic Ocean. And if we retrench the sleeve of the robe, as it is styled by their writers, the long and narrow province of march of a caravan. We should vainly seek the indissoluble union and easy obedience that pervaded the government of
Augustus and the
Antonines; but the progress of
Islam diffused over this ample space a general resemblance of manners and opinions.
The language and laws of the Quran were studied with equal devotion at
Samarcand and
Seville: the
Moor and the
Indian embraced as countrymen and brothers in the pilgrimage of
Mecca; and the
Arabian language was adopted as the popular idiom in all the provinces to the westward of the
Tigris.
The Muslim conquests brought about the collapse of the
Sassanid Empire and a great territorial loss for the
Byzantine Empire. The reasons for the Muslim success are hard to reconstruct in hindsight, primarily because only fragmentary sources from the period have survived. Most historians agree that the
Sassanid Persian and
Byzantine Roman empires were militarily and economically exhausted from decades of fighting one another. The rapid fall of
Visigothic Spain remains less easily explicable.
Some
Jews and Christians in the Sassanid Empire and Jews and Monophysites in
Syria were dissatisfied and initially sometimes even welcomed the Muslim forces, largely because of religious conflict in both empires
. In the case of
Byzantine Egypt,
Palestine and Syria, these lands had only a few years before being reacquired from the Persians, and had not been ruled by the Byzantines for over 25 years.
Fred McGraw Donner, however, suggests that formation of a state in the
Arabian peninsula and ideological (i.e. religious) coherence and mobilization was a primary reason why the Muslim armies in the space of a hundred years were able to establish the largest pre-modern empire until that time. The estimates for the size of the
Islamic Caliphate suggest it was more than thirteen million square kilometers (five million square miles), making it larger than all current states except the
Russian Federation.
Frontier warfare continued in the form of cross border raids between the
Umayyads and the Byzantine
Isaurian dynasty allied with the
Khazars across
Asia Minor. Byzantine naval dominance and
Greek fire resulted in a major victory at the
Battle of Akroinon (739); one of a series of military failures of the
Caliph Hisham ibn Abd al-Malik across the empire that checked the expansion of the Umayyads and hastened their fall
.
In the reign of
Yazdgerd III, the last
Sassanid ruler of the
Persian Empire, an
Arab Muslim army secured the conquest of
Persia after their decisive defeats of the
Sassanid army at the
Battle of Walaja in 633 and
Battle of al-Qādisiyyah in 636, but the final military victory didn't come until 642 when the
Persian army was defeated at the
Battle of Nahāvand. These victories brought Persia (modern
Iran),
Assyria (Assuristan) and
Mesopotamia (modern
Iraq) and south east
Anatolia under Arab Muslim rule. Then, in 651, Yazdgerd III was murdered at
Merv, ending the dynasty. His son
Peroz II escaped through the
Pamir Mountains in what is now
Tajikistan and arrived in
Tang China.