> Unlike Mexico, New York City does not need to maintain its borders or enforce a monopoly on the use of force and a supreme law -- because New York City is not a Westphalian state, it is just a municipal government covering a few hundred square miles!

you'd think that's the case, but it seems fairly normal for countries to have more police officers than soldiers[1][2]. Just looking at g8 countries:

     soldiers police officers
    Canada  67,400  67,425
    France  203,250  282,612
    Germany  183,500  279,200
    Italy  165,500  276,750
    Japan  247,150  296,700
    United Kingdom  148,500  148,893
    United States  1,388,100  686,665

Which makes sense, considering that it's the police officers that are in charge of "enforce a monopoly on the use of force and a supreme law". In the 21st century, border incursions are rare compared to criminal activity.

[1] https://en.wikipedia.org/wiki/List_of_countries_and_dependen...

[2] https://worldpopulationreview.com/country-rankings/military-...