The Battle of Jabal Shammar, or Battle of Umm Radh'ma (Arabic: مَعْرَكَة أُمّ رَضْمَة, romanized: Maʿrakat Umm Raḍmah), took place in August 1929, between a raiding rebellious Ikhwan party and the ally tribes of Ibn Saud. It was the second largescale engagement of the Ikhwan revolt in Arabia. The rebel Ikhwan tribesmen were defeated by the pro-Saudi forces.
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