Re: Ah! "The gentler, kinder politics of the left"
RE: "And, obviously, the USA thinks that 'nationalising' the Military is a given too. Why don't all the states have their own armies? Why don't the Cities use private Militias? Because they know that some things require Government control."
State governors do control their states' National Guard contingents (although not exclusively):
City police forces have significant freedom to buy military weapons and put their officers through combat training. Many do. There are limits on certain weapons: Nuclear reactors and bombs are heavily regulated and supersonic flight over the US is banned. Large missiles are also restricted. It might be legal for them to buy tanks and artillery.