American visas are issued by the State Department, which includes foreign U.S. embassies and consulates. There are different types of military visas available, and these visas are classified according to the length, nature and purpose of stay in the United States. Extensions are available for most types of visas
Foreign Military
The Diplomatic Liaison Division of the Visa Office accepts application for the validation of A-2 and NATO 1-6 visas for foreign military personnel stationed in America. If you are the principal applicant and you lack the Personal Identification Number (PID) assigned by the Department of State's Office Protocol, you are required to submit military orders and a letter from the US military command describing your assignment in the US. The foreign military orders must be in English or have an attached English translation.
Military Spouse/Fianc
The K-1 visa allows a military fianc (e) to travel to the United States, marry and adjust status to become a legal permanent resident. To bring a spouse to the U.S., military personnel must petition the Department of Homeland Security. It is also necessary to report and record the marriage in accordance with the laws of the country where the marriage took place.
Overseas Visas
Civilian personnel, including their dependents, require a passport and a visa to travel overseas. For official duty and travel, a Department of Defense directive requires military officers and their dependents to have a no fee passport and a Status of Forces Agreement (SOFA) stamp in their visas or passports.
Diplomatic Visas
Military officers holding a rank inferior to that of Brigadier General in the United States are eligible for diplomatic visas. Officers in the Navy and Air Force and attach s, such as career assistant attaches assigned to a diplomatic mission, can apply for diplomatic visas.
NATO Status Visa
If you are military personnel in A-12, G1-4 or NATO 1-6, you may renew your visa and those of your dependents in America. For further information, contact the Office of Diplomatic Liaison of the Visa Office (CA/VO/P/D) at the Department of State or the U.S. Mission to the United Nations (USUN) Monday through Friday, excluding U.S. holidays, between 2 p.m. and 4 p.m. (Eastern Time) (See Reference 1).