Conversation so far:
When did Brooks & Dunn split up?
On August 10, 2009, Brooks & Dunn announced that they would be splitting up after a tour titled The Last Rodeo.
Did Brooks and Dunn break up, and if so when?
Brooks & Dunn performed their last concert together at the Bridgestone Arena in Nashville on September 2, 2010, with proceeds from the concert benefiting the Country Music Hall of Fame.

Question: When did they embark on their solo careers?
Self-contained rewrite: When did Brooks & Dunn embark in their solo careers?