Heavy music reached the end of the seventies facing both triumph and transition. Several established bands released important records, but a faster and younger movement was developing underneath them. AC/DC, Van Halen and Scorpions demonstrated how large hard rock could become, while Motörhead and the emerging New Wave of British Heavy Metal pointed toward the speed, aggression and independence that would shape the next decade.

AC/DC reached a creative and commercial breakthrough with Highway to Hell. Producer Robert John “Mutt” Lange brought greater clarity to the band’s sound without weakening Malcolm Young’s rhythm guitar, Angus Young’s attack or Phil Rudd’s steady pulse. Bon Scott delivered some of his most memorable performances on “Girls Got Rhythm,” “Touch Too Much,” “Shot Down in Flames” and the title track. Scott’s death in February 1980 made it his final studio album with AC/DC, but even without that tragedy, Highway to Hell would remain one of hard rock’s defining records.

Motörhead had a remarkable year, releasing both Overkill and Bomber. The double-bass drum attack that opens “Overkill” immediately announced a new level of velocity. Lemmy, “Fast” Eddie Clarke and Phil “Philthy Animal” Taylor sounded too dirty for traditional metal, too heavy for punk and too fast for ordinary rock and roll. Bomber arrived later in the year with a rougher sound, reinforcing the trio’s reputation as one of Britain’s loudest and most relentless bands.

Van Halen proved its debut was no accident with Van Halen II. “Dance the Night Away,” “Somebody Get Me a Doctor” and “D.O.A.” preserved the first album’s energy while showing a more confident studio band. Scorpions entered a new phase with Lovedrive. Matthias Jabs joined the group, while former guitarist Michael Schenker made guest appearances. “Loving You Sunday Morning,” “Another Piece of Meat” and the title track moved the German band closer to the international breakthrough that would follow.

Thin Lizzy reunited Phil Lynott with guitarist Gary Moore for Black Rose: A Rock Legend. Moore’s playing brought a sharper edge to “Waiting for an Alibi” and “Do Anything You Want To,” while the closing title suite connected Irish history and mythology to the band’s twin-guitar sound. Moore departed during the tour, making the album a brief but powerful chapter in Thin Lizzy’s constantly changing story.

Judas Priest’s Hell Bent for Leather, the North American edition of the British album Killing Machine, arrived in 1979 with “The Green Manalishi” added to its track listing. The shorter songs and increasingly direct attack moved Priest closer to the sound of British Steel. The band’s leather-and-studs presentation was also becoming a defining visual language for heavy metal. Priest reinforced its growing reputation later in the year with the live album Unleashed in the East.

Canada continued to produce its own strain of melodic hard rock. Triumph achieved a commercial breakthrough with Just a Game, led by “Hold On” and “Lay It on the Line.” Vancouver’s Prism found major Canadian success with Armageddon, an ambitious album produced by Bruce Fairbairn. Both records became familiar sights and sounds on Canadian rock radio.

Led Zeppelin’s In Through the Out Door placed greater emphasis on John Paul Jones’ keyboards and Robert Plant’s songwriting. “In the Evening,” “Fool in the Rain” and “All My Love” revealed a band still exploring, although it would become Zeppelin’s final studio album recorded before John Bonham’s death. Meanwhile, Saxon released its debut, Def Leppard’s early recordings attracted record-company attention and Iron Maiden issued The Soundhouse Tapes. The seventies were ending, but heavy metal’s next great era was already underway.