The Obsequorians (Arabic: ۘالِإسْلَام, al-ʾIslām, lit. “Submission” [to the will of God], also known as the Muhammadans) are a religious group originating in Arabia in the 600s. Although commonly believed by Evandrians to be a branch of non-Trinitarian Christianity, they’re insistent that they’re actually not Christian at all, but a separate religion.
While most Evandrians associate the Obsequorians with Malaynesia, as previously mentioned, it was founded in Arabia by their prophet Muhammad, hence the alternative name of Muhammadism. After his death, the Obsequorians established a Republic (or Caliphate) that still exists to this day.
The Obsequorians spent the first couple centuries confined to Arabia. In the 10th century, the religion started to spread via Arabian merchants, particularly in the Indian Ocean, where they were very prolific. In particular the three places that converted the most were East Africa, the west coast of the Indian Subcontinent, and Malaynesia, where more than half of the world’s Obsequorians live today.
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Follow up to the Turkish Republic map I posted the other day. In this world, Islam failed to break out of the Arabic Peninsula, but still spread through the Indian Ocean. Without the Arab conquest of the Middle East and North Africa, it never becomes seen as the great enemy of the European Christian world, and is even seen as a weird heretical Christian offshoot in the western world, although Muslims are quick to correct this misconception.
Obsequor is Latin for "to submit," so it's a Latin translation of the Arabic word al-Islam.