[Real Badman]

Ive often found myself thinking about isolationism as a nation, and I prefer to stay out of affairs, especially when other world leader do not feel the need to step up and contribute, but in todays world, is almost impossible as a country to stay away from different affairs.
You bring up a good point about China or Russia, or worse, both, throwing everything they got at us at one time and figuring out if we could hold steady.
To be honest, China will never make that mistake. If they did send 90% of there military to attack out home land, theres would be lost to Japan in a week. IMO, China would have to leave at least half there army at home at all times, which as you know consist mostly of ground troops.
Russia on the other hand may be stupid enough to try, although im not sure why as I feel we could decimate theyre entire forces in a short amount of time, and there structure and pride just isn't what it was. I feel like they would have an enormous amount of deserters.
But, even if these countries, and all others decided to attack us at once, im still fully in belief that the things we have under wraps and secretly stashed away would be the ends of all others that try. In the end, we would have a successful nuclear missile defense while they couldn't stop ours. And we would take it to that level if we needed to save our lands.

Isolationism just isn't the thing anymore coming out of the cold war. Why should the US not take action in Africa, when Russia will? It's the same brinksmanship theory that has always been around. However one thing I'm fairly sure of is the PRC and Russia would never joining forces in any geopolitical event. China and Russia have hated each other since Christ was a child, and it will be that way until Russia accepts Mao as a true communist leader. A defacto (non)religious cold war. A good point talking about Japan though. Many people often forget that Japan is a strong pacific ally of the United States. Even more so, people forget about the forgotten holocaust of WWII when Japan tore apart China way before Hitler thought about dominating Europe. China couldn't withstand the threat of a smaller technological advanced nation that has never been invaded in history. Say what you want about Russians, but they are Russians. The number one political goal of Russia is to protect the motherland, at all costs. Of course, Stalin isn't around, but I have a feeling Putin is just as cruel. In a crazy World War III senario, I have full confidence in the United States' ability to fight off China, Russia, Iran, or any other foreign threat with the help of our allies in NATO, SEATO, and the UN.