The Napoleonic era Cuirassiers evolved from the Cavalerie de Bataille in Republican France. This cavalry in turn evolved from the royal cavalry with the reorganization of the army in 1791. In 1792 the cavalerie regiments were reduced to 25, and in 1793 a fourth squadron was added to each regiment. These were the cavalerie regiments inherited by Napoleon as First Consul in 1799.
The 9th fought in many battles during the Napoleonic era including, Austerlitz in 1805, Jenna in 1806, Eylau in 1807, Wagram in 1809 and Waterloo in 1815.