(historical) A Wahhabireligiousmilitia of the early twentieth century, made up of traditionally nomadic tribesmen, which formed a significant military force of the ruler Ibn Saud and played an important role in establishing him as ruler of most of the Arabian Peninsula in the Kingdom of Saudi Arabia.
Examples
In the 1920s, the religious fanatic Ikhwan fighters who were helping Ibn Saud to conquer Arabia were also threatening the British protectorates of Iraq and Transjordan.