Conversation so far:
Why did The Mothers of Invention break up?
In late 1969, Zappa broke up the band. He often cited the financial strain as the main reason, but also commented on the band members' lack of sufficient effort.
What else did The Mothers of Invention do in Los Angeles?
Recorded from September 1967 to September 1968 and released in early 1969, Uncle Meat, the final release by the original Mothers, was a double album of varied music.
What was The Mothers of Invention's most popular hit?
Montana
Are there any other interestring aspects about The Mothers of Invention?
He did, however, start recruiting new band members at this time, even asking Micky Dolenz from The Monkees to join.
Why did Zappa ask others to join the band?
He asked other members to join because Zappa broke up the band.

Question: What was significant about this time frame?
Self-contained rewrite: What was significant about the break up of The Mothers of Invention?