I know I'm very new here, but I find I have to comment on your back story.
Ok... For a start, the Russian military would be pretty much the last thing they would scrap. Hell, even after the fall of the Sov U, it was still well manned (the army and air force at least).
Same goes for the US. Cut backs, yes, halving their strength? no.
Why would Russia invade China
seriously, there is basically no reason for it too happen.
Also, lets say the US halves it's Navy before it attacks Utopia. That's 30 destroyers, 10 cruisers, 5 Carriers and nearly 40 submarines... Can you equal this? How?
ETA:
I'm not guessing at Russian strength, but the French have a carrier, 24 frigates, 10 subs, as well as various amphibious and auxiliary ships... That's a big combined fleet.
Also, what is the Royal Navy doing during this? Considering the damn stupid 'special relationship' I don't doubt that they would join in with the US...