Although U.S. policymakers do not often state explicitly in public the goal of preventing the emergence of regional hegemons in Eurasia, U.S. military operations in World War I and World War II, as well as numerous U.S. military wartime and day-to-day operations since World War II, appear to have been carried out in no small part in support of this goal. ...
The goal of preventing the emergence of regional hegemons in Eurasia is a major reason why the U.S. military is structured with force elements that enable it to deploy from the United States, cross broad expanses of ocean and air space, and then conduct sustained, large-scale military operations upon arrival in Eurasia or the waters and airspace surrounding Eurasia.
This objective is just one reason I oppose the European Union.
And how often have I reminded readers that unlike allies and enemies who simply need to drive off their home base, leave home port, or take off from a home airfield to be in the combat zone? America needs to spend a lot of money to create the ability to move a military overseas and sustain it even before the first combat power is purchased.
A short but useful document.