August 2003, Office of the Under Secretary of Defense for Acquisition, Technology, and Logistics. [An unclassified report](http://www.acq.osd.mil/dsb/reports/seabasing.pdf), which begins:
> The geography of the United States, as an island power with the need to project military power across two great oceans, has made amphibious warfare a core competence in the American way of war – one that will continue to be critical in protecting U.S. national interests.
> Future warfighting concepts of operations call for light, rapidly deployable, maneuver forces supported by remote fires.