The 2nd Dragoon Regiment (French: 2e régiment de dragons, 2e RD) is the only NBC Defense Unit of the French Army, stationed at Fontevraud-l'Abbaye, by Saumur in Maine-et-Loire. The current regiment is an amalgamation of the old 2nd Dragoon Regiment and the groupe de défense NBC, which took effect in July 2005. It incorporates the capabilities of the previous 2nd Dragoons, which was specialised as a reconnaissance unit, in a new mission as the sole French Army unit dedicated to combatting chemical, biological, radiological, and nuclear (CBRN) weapons.
Despite the recent formation of the regiment in its current configuration, it is the oldest French cavalry regiment, dating back to 1556. The regiment found fame as the personal regiment of Louis, Duke of Enghien and later Prince of Condé, from 1635 to 1686; in honour of the "Grand Condé", it is still called the "Condé-Dragons". The French Revolution gave it the designation of the second regiment of dragoons in the French Army, and with brief interruptions it has served under this name in successive French armies ever since.