William Joseph Fallon (born December 30, 1944) is a retired United States Navy four-star admiral who retired after serving for over 41 years. His last military assignment was as Commander, U.S. Central Command from March 2007 to March 2008. ADM Fallon was the first Navy officer to hold that position. His other four-star assignments include Commander, U.S. Pacific Command from February 2005 to March 2007, Commander, U.S.