Collateral damage
Diplomacy
Diplomacy
to be nicer
Countries do not have affairs in the way you imply in your question. Countries have foreign relations with other countries and the department that deals with these relationships is called the foreign affairs department.A foreign affairs department will have relations with all countries. some of which will be ambassadorial relationships.
People from other countries are called foreigners or immigrants.
Buying products from other countries is called importing
Greek mythology simply deals with Greece and Persia (Crete too Possibly other countries when involved in myth). Other countries ancient history is not included in this GREEK mythology.
No, even if they don't know what you're saying still never ever called stupid. That's called making fun of the countries and it is very rude.
committee on foreign relations
(Committee on Foreign Relations)
It could make deals with other countries just like the United States.
No they deal in making report which would be helpful for managers in making decision which would be helpful for firms future. Cost accountants on the other hand deals only with cost.