| Conflict: | Battle of Jabal Shammar |
| Date: | August 1929 |
| Partof: | Ikhwan Revolt |
| Place: | Kingdom of Hejaz and Nejd |
| Result: | Saudi victory |
| Combatant1: | Ikhwan |
| Combatant2: | Hejaz and Nejd |
| Strength1: | 500 men |
| Strength2: | 1,500 men |
| Casualties1: | 450 killed |
| Casualties2: | 500 killed |
| Casualties3: | 1,000 killed[1] |
The Battle of Jabal Shammar, or Battle of Umm Radh'ma (Arabic: مَعْرَكَة أُمّ رَضْمَة|Maʿrakat Umm Raḍmah), took place on August 1929, between a raiding rebellious Ikhwan party and the ally tribes of Ibn Saud. It was the second large scale engagement of the Ikhwan Revolt in Arabia. The rebel Ikhwan tribesmen were defeated by the loyal pro-Saudi forces.
After the defeat in Sabillah, Ikhwan tribesmen and government troops clashed again in the Jabal Shammar region, on August 1929, resulting in the deaths of some 1,000 men.[1]
According to Ibn Saud Information Resource, the battle, fought between Ikhwan raiders under command of Azaiyiz, son of Faisal al-Dawish, and the loyal Saudi forces of Shammar tribesmen, under the leadership of Nida bin Naheer, was "furious" and "many fell".[2] the ikhwan movement suffered many casualties than the Shammer, and the nida of the Shammar fell in the battle.[2]