The Umayyad conquest of Sindh took place in 711 AD against the ruling Brahmin dynasty of Sindh and resulted in Sindh being incorporated as a province into the Umayyad Caliphate. The conquest resulted in the overthrow of the last Hindu dynasty of Sindh, the Brahman dynasty, after the death of Raja Dahir.

The Brahmin dynasty of Sindh, also known as the Chacha dynasty, was the ruling dynasty of the Sindh, succeeding the Rai dynasty. Most of the information about its existence comes from the Chach Nama, a historical account of the Chach-Brahmin dynasty.