Regimental (adjective)

1. Relating to a regiment or its members.
2. Relating to a system of government or control.

Origin:

Late 16th century: from medieval latin regimentalis, from latin regimen, regimin- 'rule, direction'.

Examples:

1. The regimental band performed at the parade.
2. The regimental tie and blazer are part of the uniform.
3. The regimental march was played at the ceremony.
4. The regimental crest was displayed on the flag.
5. The regimental headquarters was located at the barracks.