New Hampshire voted to raise an independent army of 2000 men and established it's own postal system. Connecticut fought the war by it's own authority (military and diplomatic). Massachusetts, South Carolina and Connecticut fitted out ships for their own navy (military). When the French ambassador's house was violated it was the State of Pennsylvania that prosecuted (diplomatic). New Hampshire issued it's own letters or marquee and reprisal (military). Numerous states had their own prize and Admiralty courts that heard cases (military and diplomatic).
Again, 5 states declared their independence (diplomatic) separately. Numerous states refused to send delegates to the first called convention, Rhode Island and Providence Plantations refused to send delegates to the Philadelphia convention (diplomatic). The nine states agreeing to the Constitution (independently I might add) severed ties (diplomatic) with their remaining 4 (the AoC was no longer in force - it required UNANIMOUS consent for changes). All states commissioned their own officers (military). All states engaged in diplomacy with each other.
Justice Patterson stated in the US Supreme Court that New Hampshire, should she refuse to recognize the authority of Congress, should withdraw herself from the union (diplomatic).
Really? New one on me -- I'd heard of the diplomacy and state forces being kept (not just Militia but ships). What year did this occur in? It would have had to be after 1789, right? Since the Supreme Court didn't exist, really, until ratification.
States which contributed their own efforts also contributed to the efforts of the Union. There was a common diplomacy when dealing with other nations on issues affecting the Union. States handling things with their territory which did not affect the Union does not change the fact of speaking as One to other Nations.
Patterson was referring to the only possible legal way such a course could be done he was not saying New Hampshire could do it.