The Muslims believe in ONE and the ONLY Almighty God. They believe in the last Prophet Muhammad (SAW). They believe in the same holy Book. They have the same basic beliefs. They are termed as Brothers by Allah Almighty and the holy Prophet (SAW). So, they are united and the Empire was united on these basic beliefs.
Well there have been few Muslim empires but Salah ad Din Yusuf ibn Ayyub (Saladin) was known for uniting the Muslims under one flag.
The Arabian Empire was primarily Muslim, as was the Ottoman Empire.
Yes. The Ottoman Empire was mostly, if not all, Muslim.
After uniting Persia and Media, he conquered the Babylonian Empire.
The capital of the Muslim empire in India is Delhi. And your welcome.
The Ottoman Empire was not the largest Muslim Empire as the Umayyad Empire in 749 CE was larger. However, it may be the most influential Muslim Empire, but that is up to the perception of the person discussing it.
Aurangzeb's death lead to the decline of the Muslim empire in India.
The Ottoman Empire
Ottoman Empire
The Byzantine Empire was Christian.
The Turkish muslim empire destroyed the Romans
To me, it would be Julius Caesar for uniting the Roman Empire.