Piece of Mind

In late 1982, drummer Clive Burr left the band due to personal and tour schedule problems. He was replaced by Nicko McBrain, previously of Trust. Shortly afterwards, in 1983, the band released Piece of Mind.
The album is widely considered a fan-favourite and contains "The Trooper" and "Flight of Icarus", which were both released as singles. Songs inspired by literary works included "Where Eagles Dare" (based on the movie of the same name), "To Tame A Land" (based on the novel Dune by Frank Herbert), and the aforementioned "The Trooper", based on Tennyson's poem Charge of the Light Brigade.
As a comedic response to controversy about occult messages being backmasked in rock music at the time, a backwards message can be heard at the start of the track "Still Life", which consists of McBrain impersonating Idi Amin Dada:
Hmm, Hmmm, what ho sed de t'ing wid de t'ree bonce. Don't meddle wid t'ings you don't understand.