In Localism, the national government is not allowed to keep its own ground forces, it has to borrow them from the states (who presumably get them from the counties). The present Constitution bans the states from keeping troops, and counts on the militia by itself being strong enough to check a federal army. With modern military weapons the balance of power has shifted so much I don't think that is enough of a deterrent by itself.
There are many other benefits which would occur from this arrangement, including making empire building a lot harder.
Localism, A Philosophy of Governmen" E-book on Amazon: http://www.amazon.com/Localism-A-Philosophy-Government-ebook...
On Barnes and Noble: http://www.barnesandnoble.com/w/localism-a-philosophy-of-gov...
Localism is for people who can still sleep at night even though somebody they don't know in a city they have never been is doing things differently. ("Localism, A Philosophy of Government" on Amazon for Kindle or Barnes and Noble ebook websites)
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