Fatah is also a word that was used in early Islamic Caliphate to refer to 'conquest'.

Finally, "Islamic civilization" may also refer to the aspects of the synthesized culture of the early Caliphates, including that of non-Muslims.

Historically, it was a financial institution responsible for the administration of taxes in Islamic states, particularly in the early Islamic Caliphate.

A thousand years later, the modern Islamic philosopher, Muhammad Iqbal, also viewed the early Islamic Caliphate as being compatible with democracy.

Madelung, W., The Succession to Muhammad (A study of the early Caliphate), Cambridge University Press, 1997.

He also wrote a book "the early Islamic Caliphate"

Some of the earliest coins to be made purely from silver and gold were the silver Dirham and gold Dinar in the early Islamic Caliphate from the 7th century.

Conrad I. Lawrence estimates the average lifespan in the early Islamic Caliphate to be above 35 years for the general population.

As such, they played an important part in the development of Islamic thought and philosophy, and in the political development of the early Caliphate.

The conquest of the region took place under the early Caliphate that left the general administration of the region intact, with the exception of levying the jizya tax on the population.