A "Sky Pilot" is a military chaplain, hence the lyric "He blesses the boys as they stand in line." The song finds the chaplain telling the soldiers that they are fighting for a greater cause, as they are "soldiers of God." At the end of the song, one of the soldiers returns from battle and realizes the words of the chaplain go against what he learned in the Bible: "Thou shalt not kill." The pipe band was the Royal Scot's Dragoon Guards, a Highland regiment. Lead singer Eric Burdon tape-recorded them at a school and used the pipe music during the middle of the song along the war sound effects. Burdon received an angry letter from the British government for his use of the pipe music. The tune he used was "All The Bluebonnet's Are Over The Border," which is a classic Scottish war piece written as an anti-war epic during the Vietnam War.