The Omanis were among the first people to embrace Islam voluntarily. The conversion of the Omanis is usually ascribed to Amr ibn al-As, who was sent by the prophet Muhammad around 630 AD to invite Jaifar and ‘Abd, the joint rulers of Oman at that time, to accept the faith, in which he eventually succeeded.
In accepting Islam, Oman became an Ibadhi state which is named after alkhoarej, ruled by an elected leader, the Imam. During the early years of the Islamic mission Oman played a major role in the Wars of Apostasy that occurred after the death of Muhammad and also took part in the great Islamic conquests by land and sea in Iraq, Persia and beyond. However, its most prominent role in this respect was through its extensive trading and seafaring activities in East Africa, particularly during the19th century, when it propagated Islam in many of East Africa’s coastal regions, and certain areas of Central Africa.
Omanis also carried the message of Islam with them to China and the Asian ports. Oman was ruled by Umayyads between 661-750, Abbasids between 750-931, 932-933 and 934-967, Qarmatians between 931-932 and between 933-934, Buyids between 967-1053, Seljuks of Kirman between 1053-1154.