Making the assumption that you know basic US History, post-WW2 anyway, the established logistical base in Germany provided significant forward support for our troops in Iraq and Afghanistan. This was especially true for the medical support for injured troops. That said, as our efforts in Southwest Asia come to an end, the need for that forward support is significantly reduced.
I spent 13 months in Korea many years back. We had listening posts, nike bases aimed at China, but most importantly 2nd Inf Div was air mobile. If something was to jump off in Asia, 2nd inf could be there yesterday. Do our own Freepers not realize basic fundamentals?
If we plan on not having oil (try not driving today for starters), foreign goods (that's whats on the walmart shelves), and our decent standard of living (USA is Chinese #1 place to immigrate to);;;; we have to keep a strong military around the world.