Conversation so far:
What did At Fillmore East compose?
At Fillmore East is the first live album by American rock band the Allman Brothers Band, and their third release overall.
What was notable or interesting about At Fillmore East?
Produced by Tom Dowd, the album At Fillmore East was released in July 1971 in the United States by Capricorn Records.
Was the album At Fillmore East successful?
At Fillmore East peaked at number thirteen on Billboard's Top Pop Albums chart, and was = certified platinum on August 25, 1992.
What happened with the Allman Brothrers do after At Fillmore East?
In 1972 the Allman Brothers released the album Eat a Peach.
Where did the Allman Brothers perform after that final concert at Fillmore East?

Question: What is interesting about this time period with the band and composing?
Self-contained rewrite: What is interesting about the At Fillmore East time period with the Allman Brothers and composing?