I've heard from other soldiers that have been in Iraq (I haven't been deployed yet...) but they said for their 2 weeks of leave, not to come back to the states.
The pay that they earn is tax free ( maybe I'm confusing this with civilian contractors there), but if the return to the states before 300 day rule, their pay is taxed.
Just thought that I'd share how the troops (or maybe civilians) in Iraq are getting taxed.