A Nation must defend it's Sphere of Influence.
At the start of the Nation we were so peripheral and insignificant that we had no Sphere of Influence, and had no business getting involved anywhere, as Washington observed.
By the time of Thomas Jefferson our Sphere had expanded to Sea Trade and required defeating the Barbary Pirates and maintaining a fleet.
Our sphere soon expanded via the Monroe Doctrine to include all of this hemisphere.
After WW II our Sphere included all of the free world and we defended it as necessary.
With te collapse of Communism, our Sphere of Influence became the entire planet.
We can either defend our Sphere and, if we wish, rule it, but any warfare or terrorism on this planet is now directed one way or the other at us. We must fight it overseas or we must fight it at home.
So9
Long live the empire!