He also recorded several songs with the band including the No Life 'Til Leather demo tape.A few of the songs he wrote with Hetfield and Ulrich went on to be re-recorded by Metallica.The most well-known of these is "The Four Horsemen" from Kill 'Em All, which Mustaine wrote as "The Mechanix" and later released on Megadeth's debut album with the original lyrics as "Mechanix".Fallen Angels was the name of the short-lived band that Mustaine founded after his departure from Metallica.Metallica's drummer Lars Ulrich had posted an ad in a local newspaper, The Recycler, looking for a lead guitarist.In his own words, Mustaine remembers his first meeting with James Hetfield and Lars Ulrich: "I was in the room warming up and I walked out and asked, 'Well, am I gonna audition or what?On April 11, 1983, after Metallica had driven to New York to record their debut album, Mustaine was officially fired from the band because of his alcoholism, drug abuse, overly aggressive behavior, and personality clashes with founding members Hetfield and Ulrich, an incident Mustaine refers to as "no warning, no second chance".The band packed up Mustaine's gear, drove him to the Port Authority Bus Terminal, and put him on a Greyhound bus bound for Los Angeles.
The following year, major label Capitol Records signed Megadeth and obtained the rights to their second album, Peace Sells... The band also toured with King Diamond whose previous band, Mercyful Fate, were a huge influence on Megadeth.
Dave says after the band started to fall apart in 1981, Tom Quecke tragically passed away.
In 1981, Mustaine left Panic to join Metallica as the lead guitarist.
It was on this bus ride that Mustaine scribbled some lyrical ideas on the back of a hand bill, which would later become the song "Set the World Afire" from the 1988 Megadeth album So Far, So Good... During his time in Metallica, Mustaine toured with the band, co-wrote four songs that appeared on Kill Em All, and co-wrote two songs that would eventually appear on Ride the Lightning.
Mustaine has also made unverified claims to have written parts of "Leper Messiah" from Master of Puppets.
', and they said, 'No, you've got the job.' I couldn't believe how easy it had been and suggested that we get some beer to celebrate." Mustaine's membership in Metallica ended before recording Kill 'Em All in 1983.