But behind their accomplishments and popularity, lies a big decision that changed their trajectory entirely.

The moment in question has become one of rock music’s most talked-about events.

But what caused the band to come to such a drastic decision?

Metallica performs in Los Angeles at Sofi Stadium.

Image via Francine Orr/Los Angeles Times/Getty Images

The answer to that centers around substance abuse and a clash of wildly different personalities.

Dave Mustaines Downfall in Metallica

The year was 1983.

The group had grown tired ofMustaine’s heavy drinking and erratic behavior during his inebriated moments.

Best-Metallica-Songs-Ranked

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There is music to be played, and history to be made.

“I would drink and have fun until someone would refute something I had said.

And then that was war, baby.

Every Metallica Album, Ranked

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Id be aggressive and confrontational because I was a violent drunk.

I lost all inhibitions when I was drinking, and that didnt go over to well in the end.

But I would say we’re probably better off now than we’ve been for a long time.

james hetfield and lars ulrich rock on their guitar and drums, respectively

And it comes and goes.”

Get up close and personal with this one-of-a-kind experience.

A tour and documentary are not the only things keeping the band busy.

In a recent interview with Rolling Stone, Hammett relayed tidbits about the album.