Conversation so far:
What happened in 1977?
The band hired Robert Fleischman and transitioned to a more popular style.
Why did they change their musical direction?
Journey's album sales did not improve and Columbia Records requested that they change their musical style and add a frontman, with whom keyboardist Gregg Rolie could share lead vocal duties.
What was Robert's role with the band?
CANNOTANSWER.
Did they release any new albums?
Journey released their fourth album, Infinity (1978).
Did Infinity do well?
This album set Journey on their road to stardom with their first RIAA-certified platinum album.
Did it have any hit singles?
This album, with their hit song "Wheel in the Sky" (#57 U.S.), set Journey on a new path with a more mainstream sound.
What else did you find interesting?
In late 1978, manager Herbie Herbert fired drummer Aynsley Dunbar.
Why did he fire him?
CANNOTANSWER.

Question: What happened after he was fired?
Self-contained rewrite: What happened after Aynsley Dunbar was fired?