What is "carabiniers-a-cheval"

The Carabiniers-à-Cheval (Horse Carabiniers) were mounted troops in the service of France.

Their origins date back to the mid-16th century, when they were created as elite elements of the French light cavalry, armed with carbines but then gradually evolved towards semi-independent status during the 18th century. They only became independent units as late as 1788, when a two-regiment heavy cavalry corps was created. From the French Revolutionary Wars onwards, they were the senior heavy cavalry regiments in the French army, rose to prominence during the Napoleonic Wars and were disbanded in 1871, after the fall of the Second French Empire.