1) Part of the State Department 
the field force of a foreign office, comprising diplomatic and consular personnel engaged in representing the home government`s interests abroad and ...
Employment abroad, provided that:
[n] - the part of the executive branch that supplies diplomats for the United States embassies and consulates around the world
Employment abroad, provided that: * the employee is not resident or ordinarily resident in the UK, or * the employee is entitled to claim the foreign earnings deduction (or would have been had the deduction not been abolished from 17 March 1998).
noun the part of the State Department that supplies diplomats for the United States embassies and consulates around the world
Employment at an Ordnance outstation outside of the British Isles
a division of the U.S. Department of State or of a foreign office that maintains diplomatic and consular posts and personnel in other countries.