3rd (Prince of Wales's) Dragoon Guards

3rd Dragoon Guards (Prince of Wales's Dragoon Guards)
Badge of the 3rd Dragoon Guards
Active	1685–1922
Country	Kingdom of England (1685–1707)  Kingdom of Great Britain (1707–1800)  United Kingdom (1801–1922)
Branch	Army
Type	Line Cavalry
Role	Cavalry
Size	One regiment
Garrison/HQ	RHQ
Motto(s)	Ich Dien (I Serve)
March	Quick - God Bless the Prince of Wales Slow - Men of Harlech

The 3rd (Prince of Wales's) Dragoon Guards was a cavalry regiment in the British Army, first raised in 1685 as the Earl of Plymouth's Regiment of Horse. It was renamed as the 3rd Regiment of Dragoon Guards in 1751 and the 3rd (Prince of Wales's) Dragoon Guards in 1765. It saw service for two centuries, including the First World War, before being amalgamated into the 3rd/6th Dragoon Guards in 1922.

The regiment was first raised by Thomas Hickman-Windsor, 1st Earl of Plymouth as the Earl of Plymouth's Regiment of Horse in 1685 as part of the response to the Monmouth Rebellion, by the regimenting of various independent troops, and was ranked as the 4th Regiment of Horse. The regiment saw action at the Battle of Schellenberg in July 1704, the Battle of Blenheim in August 1704, the Battle of Ramillies in May 1706, the Battle of Oudenarde in July 1708 and the Battle of Malplaquet in September 1709 during the War of the Spanish Succession. In 1746 it was ranked as the 3rd Dragoon Guards, and formally titled in 1751 as the 3rd Regiment of Dragoon Guards.

Shortly thereafter, in 1765, it took the title 3rd (Prince of Wales's) Dragoon Guards, for the future George IV. It took part in the suppression of the Bristol riots in 1831 and, after service in India, took part in the British Expedition to Abyssinia in 1868. The regiment was employed chasing the elusive General Christiaan de Wet in spring 1901 during the Second Boer War.