Here's a good article on military bases..
and I love the way William Blum puts it...
The American Empire: 1992 to present
from the book
Killing Hope
by William Blum
2004 edition
Following its bombing of Iraq in 1991, the United States wound up with military bases in Saudi Arabia, Kuwait, Bahrain, Qatar, Oman and the United Arab Emirates.
Following its bombing of Yugoslavia in 1999, the United States wound up with military bases in Kosovo, Albania, Bulgaria, Macedonia, Hungary, Bosnia and Croatia.
Following its bombing of Afghanistan in 2001-2, the United States wound up with military bases in Afghanistan, Pakistan, Kazakhstan, Uzbekistan, Tajikistan, Kyrgyzstan, Georgia, Yemen and Djibouti.
Following its bombing and invasion of Iraq in 2003, the United States wound up with Iraq.
This is not very subtle foreign policy. Certainly not covert. The men who run the American Empire are not easily embarrassed.
And that is the way the empire grows-a base in every neighborhood, ready to be mobilized to put down any threat to imperial rule, real or imagined. Fifty-eight years after world War II ended, the United States still has major bases in Germany and Japan; fifty ears after the end of the Korean War, tens of thousands of American armed forces continue to be stationed in South Korea.
"America will have a continuing interest and presence in Central Asia of a kind that we could not have dreamed of before," US Secretary of State Colin Powell declared in February 2002. Later that year, the US Defense Department announced: "The United States Military is currently deployed to more locations then it has been throughout history."