Merriam-Webster

A strict disciplinarian : a person who stresses a rigid adherence to the details of forms and methods

1811 Vulgar Tongue

A military term for a strict disciplinarian: from the name of a French general, famous for restoring military discipline to the French army. He first disciplined the French infantry, and regulated their method of encampment: he was killed at the siege of Doesbourg in the year 1672.

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