Colonel-in-chief is a ceremonial position in a military regiment. It is in common use in several Commonwealth armies, where it is held by the regiment's patron, usually a member of the royal family.
Sir Nils Olav (a king penguin) inspects troops of the Norwegian Royal Guard, of which he is Colonel-in-Chief
A regiment is a military unit. Its role and size varies markedly, depending on the country, service, or specialisation.
Romanian 27th Infantry Regiment in front of the Hungarian Parliament in 1919
The Royal Regiment of Fusiliers on parade in England
Regimental badge of the Scots Guards.
Personnel of the 154th Preobrazhensky Independent Commandant's Regiment during an exhibition drill.