Conversation so far:
what season did Beccy cole join tour de force series of concerts?
During the festive season, Beccy Cole joined the Tour de Force series of concerts in Iraq and across the Middle East.
What time period is he festive season where Beccy Cole joined the Tour de Force series of concerts?
The festive season when Beccy Cole joined the Tour de Force series, is from December 2005 through January 2006.
Where Beccy Cole's Tour De Force concerts in the 2005-2006 festive season take place?
Beccy Cole's Tour De France concerts in the 2005-2006 festive season took place in Iraq and across the Middle East“.
Why did Beccy Cole perform the Tour De Force concerts during the festive season of 2005-2006?
Beccy Cole joined the Tour De Force concerts to perform for the Australian Defense Force.

Question: what operation were they a part of?
Self-contained rewrite: what operation were the Australian Defense Force a part of?