You apparently don’t know that we have 160 bases in foreign lands e.g. a world empire. If you think that world polcing of that type has anything to do with the decentralized republic advocated by the founders, you don’t know much about American History.
You obviously A) have a strange definition of “base”, and B) don’t know we exercise no sovereignty over other countries.
We do, however, take pro-active steps to protect our interests. We don’t have the Founder’s luxury of hiding behind two oceans...