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.
Military organization (AE) or military organisation (BE) is the structuring of the armed forces of a state so as to offer such military capability as a national defense policy may require. Formal military organization tends to use hierarchical forms.
A mixed aircraft and ship formation of military vehicles during an exercise with USN and JASDF vehicles.