‘Once upon a time, you could trace the spread of imperialism by counting up colonies. America's version of the colony is the military base; and by following the changing politics of global basing, one can learn much about our ever more all-encompassing imperial "footprint" and the militarism that grows with it.

It is not easy, however, to assess the size or exact value of our empire of bases. Official records available to the public on these subjects are misleading, although instructive. According to the Defense Department's annual inventories from 2002 to 2005 of real property it owns around the world, the Base Structure Report, there has been an immense churning in the numbers of installations.

The total of America's military bases in other people's countries in 2005, according to official sources, was 737. Reflecting massive deployments to Iraq and the pursuit of President Bush's strategy of pre-emptive war, the trend line for numbers of overseas bases continues to go up.

Interestingly enough, the thirty-eight large and medium-sized American facilities spread around the globe in 2005 - mostly air and naval bases for our bombers and fleets - almost exactly equals Britain's thirty-six naval bases and army garrisons at its imperial zenith in 1898. The Roman Empire at its height in 117 AD required thirty-seven major bases to police its realm from Britannia to Egypt, from Hispania to Armenia. Perhaps the optimum number of major citadels and fortresses for an imperialist aspiring to dominate the world is somewhere between thirty-five and forty.

The following is excerpted from Chalmers Johnson's new book, “Nemesis: The Last Days of the American Republic" (Metropolitan Books).

737 US Military Bases = Global Empire