I hear you...
Although...I think Jessica had no idea just how brutal it was going to get...
perhaps it was the Iraqis who had no idea about Jessica :-)
At the present, we can only speculate about what preconceptions, if any, she may or may not have had. And perhaps she did in fact join the military partly to serve her country and her President...it's certainly within the realm of the possible.
I think we should let Jessica speak for herself. She's obviously a very capable young woman.