In what year did Metallica release the album which preceded "Master of Puppets"?
Ride the Lightning: Ride the Lightning is the second studio album by American heavy metal band Metallica, released on July 27, 1984, by the independent record label Megaforce Records. Kill 'Em All:  The album did not enter the "Billboard" 200 until 1986, when it peaked at number 155, following Metallica's commercial success with its third studio album "Master of Puppets"; the 1988 Elektra reissue peaked at number 120.
1984