From the SFgate article:
"Instead of going to Afghanistan, as the brothers expected, their Ranger battalion was sent to participate in the U.S.-led invasion of Iraq in March 2003. The Tillmans saw combat several times on their way to Baghdad. In early 2004, they finally were assigned to Afghanistan."
Just read the SF story.
Short of anything to contradict the SF atricle, I stand corrected.
However, it being a very liberal paper and renown for its mistakes, I don't accept it as "holy rit"