No, they don't. Swedes have a bit more than 50k compared to 35k NYC cops. As to what good they could do, that's somewhere around 30% of the force with which Russia invaded Ukraine, so it is significant when added to the forces of other allies.
Benefits the U.S. by adding to the strength with which Europe can provide for its own defense.
Swedish territory lends well to defense so raw numbers are not completely relevant. Also, the Swedes ran a nuclear weapons program from 1945 to 1972 when they supposedly stopped. I imagine if they had to, they could dust that off and restart.
Check your facts, Bruce.
Swedish active military: 29,750.
https://en.wikipedia.org/wiki/List_of_countries_by_number_of_military_and_paramilitary_personnel
NYPD: 38,500 active police officers.
https://policeteststudyguide.com/new-york-city-police-department/