The Royal Dragoons (1st Dragoons) was a mounted infantry and later a heavy cavalry regiment of the British Army. The regiment took part in the charge of the Union Brigade under command of Major-General William Ponsonby at the Battle of Waterloo. Captain Alexander Kennedy Clark, an officer in the regiment, captured the French Imperial Eagle of the 105th Line Infantry Regiment during the battle.
The regiment was formed in 1661 as the Tangier Horse. It served for three centuries and was in action during the First and the Second World Wars. It was amalgamated with the Royal Horse Guards to form The Blues and Royals in 1969.