Why, from the Classical Liberal viewpoint, should the State act as a night watchman? What does this even Entail?

-Because of Negative Freedom, The State should Prevent Citizens from Harming each other, and Restricting Individual Freedom -At Best, the State is a Necessary Nuisance -At Worst, the State is Oppressive and Coercive -The Minimal State thus has a Role Relating to Law and Order and has no Place in the Runnings of the Free Market of Personal Lives of Individuals