| Active | 1643 to 1660 |
| Country | England |
| Allegiance | Parliamentarian |
| Conflicts | First Civil War |
| Second Civil War | |
| Glencairn’s Rising | |
| Type | Horse |
| Colonel | Francis Thornhaugh |
| Thomas Saunders | |
| William Goffe | |
| Richard Cromwell | |
| Ralph Knight | |
| Duke of Gloucester | |
| Area Raised | Nottingham |
| Flag Colour | |
| Flag Design | |
| Field Armies | Meldrum 1644 |
| Leven 1645-6 | |
| Cromwell 1648 | |
Parliamentarian regiment of horse based at Nottingham in the First Civil War and fighting on the Preston campaign in the Second Civil War
A history of the regiment is given in The Regimental History of Cromwell's Army by Sir Charles Firth and Godfrey Davies, Clarendon Press, Oxford, 1940.
Francis Thornhaugh raised his regiment of horse in late 1642 or early 1643. It was based at Nottingham, the city being under the governorship of John Hutchinson. Hutchinson's wife, Lucy Hutchinson, wrote a diary that mentions a number of the regiment's actions. In 1643 Thornhaugh's served at the unsuccessful first siege of Newark and later in the year were victorious at Gainsborough under Meldrum's command and alongside Oliver Cromwell's Ironsides. Over the winter of 1643 to 1644 Nottingham was put under severe pressure by the Royalists but the garrison resisted all attempts. In the spring of 1644 Thornhaugh led the regiment to the second siege of Newark, where they were defeated by Prince Rupert's relief force at the Battle of Newark. The regiment were involved in a number of skirmishes throughout 1644, and were led for a time by Hutchinson while Thornhaugh recovered from a wound. Thornhaugh reinforced Poyntz at the Battle of Rowton Heath in 1645, then led the regiment to reduce the garrisons of the Nottinghamshire Royalists, ending the First Civil War at the third and final siege of Newark.
Thornhaugh's regiment sided with the army in 1647, then in the Second Civil War of 1648 fought in Cromwell's army on the Preston campaign. Thornhaugh was killed pursuing Scots lancers after Preston and the regiment was given to its major, Thomas Saunders. During the 1650s the regiment served in Scotland and England without seeing much further action. By 1659 they were serving in Scotland and formed part of Monck's army that marched on London from Coldstream. After some changes of command, the regiment were disbanded in December 1660.
Best known for being one of the three colonels who petitioned against the Protectorate.