For his first solo album after his groundbreaking work with the Police, The Dream of the Blue Turtles (1985), Sting formed a new band. Rolling Stone reports that the group included “young jazz hotshots from Weather Report (drummer Omar Hakim) and the Miles Davis group (bassist Darryl Jones), plus saxophonist Branford Marsalis and keyboardist Kenny Kirkland. These aren’t the usual sleepy gang of veteran sidemen; they never bothered to learn pop-jazz clichés, but they know their Jimi Hendrix, Chic, Herbie Hancock and Led Zeppelin, along with their Duke Ellington … Sting still writes short, modal melody lines … if you listen to the way verses and phrases end, there are new twists, surprising extended chords by way of Steely Dan, Weather Report and Ellington … (with) delicate-to-martial dynamics.”
In Musician magazine, Sting explained: “‘Fortress’ is about appeasement, about trying to bridge the gaps between individuals. The central image is a minefield that you’ve laid around this other person to try and protect them. Then you realize that you have to walk back through it.”
The verses leave a light footprint in terms of feel, belying difficult subject matter and complex harmonies. Three keys are touched on during the verse (0:45 – 1:22) before the tune opens up into the relatively straightforward chorus. Calling it “one of the most complex pop songs ever,” Rick Beato dissects the tune’s physiology in detail here (1:57 – 8:13).
