For better information she can contact the JAG office at her husband's unit. They know pretty straight forward those issues plus with the Iraq war many rules have been applying for alien spouses and dependents...so not necessarily the most recent stuff is out there or is even available just by google it.
"Expeditious Naturalization For Dependents
A spouse married to a United States citizen, whether military or civilian, whom the United States government assigns overseas may qualify for expeditious processing of an application for naturalization. The spouse must be a Lawful Permanent Resident (LPR) but all residency and physical presence requirements are waived. The overseas assignment of the U.S. citizen must be one year or more after taking the oath of naturalization. In order to be eligible for the expeditious naturalization USCIS must find that marital unity exists.
Procedure: Along with filing Form N-400, the spouse should obtain a completed Form DD-1278, Certificate of Overseas Assignment to Support Application to File for Petition for Naturalization, from the member’s command if concurrent travel is authorized. If concurrent travel is not authorized, then the spouse must provide a copy of the orders, paid airline ticket to the overseas duty station, and a letter from the commanding officer stating that the military will permit the alien spouse to accompany the member at his or her own expense.
Even if the citizen spouse is stationed in an area where hostilities are in progress, and in which official government policy precludes residence of dependents of serviceman, expeditious naturalization is still authorized. Since the petitioner’s inability to join the citizen spouse is not the result of volition, but is caused by official restrictions, naturalization can be granted to a petitioner who plans to reside in a foreign country while awaiting the opportunity to join the citizen spouse. It is immaterial in such cases whether the petitioner’s temporary sojourn abroad is near the place of the spouse’s employment or service, or whether occasional visitation is contemplated. However, the alien cannot comply with the special statute if they elect to remain in the United States during the period of enforced separation. Moreover, this benefit is likewise deemed to be unavailable if there are no official residence restrictions, and the unwillingness to joining the citizen spouse is thus attributable to choice rather than compliance. The expeditious naturalization option for spouses is not available once the overseas tour is over. An alien spouse is eligible for expeditious naturalization even if she is a conditional resident.
The applicant does not have to reside within the jurisdiction of the district of the Service where naturalization is sought, and the naturalization application thus can be filed in any district of the Service. For more information:
· The National Customer Service Center provides information about the naturalization process for persons living in the continental United States. 1-800-375-5283
· The USCIS Internet Home Page provides information, instructions, and downloadable forms and guides.
http://uscis.gov.
· You may wish to contact your local legal assistance office. An attorney may be able to help you file the appropriate documents and provide answers to more specific questions."