Martinet

[Sarah]

In military language, a strict disciplinarian; in general, onewho lays stress on a rigid adherence to the details of discipline, orto forms and fixed methods. [Hence, the word is commonly employed ina depreciatory sense.]

[Monty]

A person who demands complete obedience; a strict disciplinarian.

[Donald Trump]

someone who demands that rules and orders always be obeyed, even when it is unnecessary or unreasonable to do so

[Tariq Zaki]

A strict disciplinarian, especially in the armed forces.