Could be her battalion was attached to the 41st Brigade for deployment during OIF. It is a combat support battalion.
I don’t want to seem rude, but your post was kinda in the Captain Obvious territory considering my service and connections in that Brigade.
I had a couple good friends get killed and wounded around that time period. (Sgt Justin Eyerly KIA, SPC Nathan Melton WIA) that were in 41st Brigade attached to 1st Cav. Hence my curiosity.