Revelation in the holy Quran and in their strong faith
Trade routes/Renaissance
The question as phrased is nonsensical. The Byzantines were Orthodox Christians, not Muslims. In fact the Muslims (under various empires) were almost consistently the enemy of the Byzantine Empire for nearly 700 years.
because it was a muslim territory and and before that the arabs had a different belief.
Since the Byzantines and Sassanian Persians considered each other the only real civilizations in the region, they fought each other numerous times in the early 600s C.E. over control of what is today East Turkey and Iraq. These were intense religious wars (Christian vs. Zoroastrian) and greatly weakened both empires at just the wrong time, leading to a very porous southern defense and miscalculation of the Islamic Armies. Because of this, the Muslims were able to completely destroy Sassanid Persia and conquer over two-thirds of the Byzantine Empire.
The Safavid dynasty ruled one of the greatest Persian empires since the Muslim conquest of Persia and established the Twelve school of Shi'a Islam as the official religion of their empire, marking an important turning points in Muslim history.
seljuk´s were muslim and byzantines were chrystian but theydid grow and fall in the same part of the world
Muslim policy of ruling was not aiming at having more power or more resouces on gaining lands and controlling more people; as other empires of the Byzantines or Persians, or others in ancient and modern history. Muslim policy was only to bring justice, free people will to select by their own free will the faith they are convinced in, and to spread justice.
The Byzantine Empire was Christian.
As Islam spread, various aspects of cultures, sciences, and arts were absorbed into the Muslim empires, including elements from Persian, Indian, and Byzantine civilizations. However, one significant cultural aspect that was generally not absorbed was the polytheistic religious practices of pre-Islamic societies, as Islam emphasized monotheism and the rejection of idolatry. Thus, while many cultural and intellectual contributions were integrated, the core religious beliefs of non-monotheistic traditions were largely excluded.
Muhammad, the founder of Islam, primarily conquered territories in the Arabian Peninsula during his lifetime. His most notable military campaigns included the conquest of Mecca in 630 CE, which solidified his control over the city and its surrounding regions. Additionally, he unified various tribes of Arabia under Islam through a series of battles and treaties, leading to the establishment of a significant Islamic state. After his death in 632 CE, Muslim expansion continued under the caliphs, spreading beyond Arabia into parts of the Byzantine and Persian empires.
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