Conversation so far:
What did The Wallflowers do in 2004?
In July 2004, the Wallflowers returned to the studio to record their fifth album, Rebel, Sweetheart.
What was The Wallflowers next album?
On October 14, 2004, the Warren Zevon tribute album Enjoy Every Sandwich: The Songs of Warren Zevon was released.
What did The Wallflowers try next?
On October 31, 2004, the Wallflowers were flown to perform for the returning troops.

Question: What did this mean
Self-contained rewrite: What did performing for the military mean for The Wallflowers?