The regiment was raised as the first of the new regiments of light dragoons in 1759, and named Elliot's Light Horse, after George Augustus Eliott, 1st Baron Heathfield who had raised the regiment. It was then renamed the 15th Regiment of (Light) Dragoons. In 1760, the 15th was the first unit in the British Army to be awarded the battle honour "Emsdorf" for distinguished conduct at the Battle of Emsdorf in the Seven Years' War.

In 1766, the regiment was renamed in honour of George III as the 1st (or The King's Royal) Regiment of Light Dragoons, the number being an attempt to create a new numbering system for the light dragoon regiments. However, the old system was quickly re-established, with the regiment returning as the 15th (The King's) Regiment of (Light) Dragoons in 1769. They became hussars in 1807, as the 15th (The King's) Regiment of (Light) Dragoons (Hussars).  Some still refer to them by the old name. Their motto is Merebimur (We Shall Be Worthy) and they do their best to ensure this is true, with the spirit and dash that characterises the Light Horse regiments.

Characters in the 15th Hussars:

Captain Damion Kitsure, OC 3 Squadron

Lieutenant Alexander Harmon, 3 Squadron

Cornet Timothy Willoughby, 3 Squadron

Trooper James 'Jem' Yards, 3 Squadron