The Pentagon's latest 39-page 2009 Quadrennial Roles and Missions Review, released yesterday, is notable for numerous reasons, including this oddity: It does not specifically mention the Navy or Marine Corps in the text.
This may bear repeating: In a congressionally mandated report the defense secretary says "lays a foundation for understanding the department's roles and responsibilities in today's complex security environment," the words "Navy" and "Marine Corps" do not appear (save for photo credits, a photo caption and one "Navy" in a chart).
And in case you are wondering, both the Army and the Air Force are cited in the text of the thing many times.