How much do we spend today?
You raise an interesting point. Then we faced a bloc, the Warsaw Pact lead by the Union of Soviet Socialist Republics. There was one really big threat. We had to be in many places to counter it but we understood it and we developed strategies, and tactics to defeat our one big threat.You seem to think that the threats we face today are more existential then total annihilation that the USSR threatened. That to me is simply another delusion you have. Why we should spend more now then we did against an enemy that could actually end America is not rational nor reasonable, but most of your posts are neither anyways.
Now we have many threats. They are more diffuse. Each is less threatening than 30% casualties in a global nuclear war. Which is harder to prepare for and to counter? How many unique threats do we face today? 25? 30? 50?
We stilll have to be ready to fight and win anywhere in the world.
It would be a very worthwhile exercise to imagine the threats we may face in twenty years and then imagine the kinds of forces and training we will need to counter those threats or to fight and to win our nation's battles.
Merely lopping off a hundred billion dollars each year for ten years hardly seems like the adult way of doing business.