United Kingdom

Carte-de-Visite, studio Benjamin Richard in Haverfordwest
Pembroke Yeomanry Cavalry (Castlemartin)

It's a bit of a shame that the photograph to the right is so faded, as it displays the very interesting shako (note the cap lines) adopted  by the Pembroke Yeomanry about 1856 (after the fashion of the French Chasseurs d'Afrique). It will later be replaced by a Hussar busby.