American Leo 1838 commemorates the beginning of American law enforcement's call to serve 24/7/365. 

In 1838, a bill passed in the Massachusetts General Court that allowed the city of Boston to appoint police officers, paving the way for the creation of a formal police department. The Boston Police Department was formally founded in May 1854, at which point both the night watch and Day Police were disbanded. The Day Police, which had no connection to the night watch, was organized as a result of the 1838 law. The Day Police operated under the city marshal and had six appointed officers. The day and might watches remained separate until 1854. The establishment of the day watch started law enforcement's 24/7/365 call to service. This organization would eventually lead to the establishment of the modern-day Boston Police Department.