Rashidun cavalry
The Fursān (cavalrymen) of the Rashidun army constituted the mounted arm of early Muslim forces during the Muslim conquest of Syria. Within this arm, an elite cavalry formation emerged that later sources and modern historians commonly describe as the Mobile Guard (Arabic: طليعة متحركة, ṭalīʿa mutaḥarrika, or Arabic: الحرس المتحرك, al-ḥaras al-mutaḥarrik), sometimes also referred to as the Marching Army (جيش الزحف, Jaish al-Zaḥf).