United Kingdom

Cabinet Card, Lambert Weston & Son, in Dover and Folkestone
Royal East Kent Mounted Rifles

This subject is wearing the 1863 uniform, with a distinctive rifle-green jacket, adorned with four rows of curved braiding and with scarlet facings.
The equally distinctive astrakhan busby is topped by a green over scarlet plume.

This subject is an officer, as hinted by the pouch belt pattern, and the green under scarlet throat plume worn by his horse.