Over what issues did the eastern orthodox church and the roman catholic church argue?

It started over the use of icons.The Romans wanted to use icons while the Eastern Orthodox so it as worshipping a false god. This resulted in the Roman Pope excommunicating the Emperor because he banned icons.

(d) it was complex and capable of highly organized efforts.

Protecting and assisting  u.s. citizens  living or traveling abroad; assisting u.s.  businesses  in the international marketplace; coordinating and providing support for international activities of other u.s. agencies (local, state, or federal government), official visits overseas and at home, and other diplomatic efforts.keeping the public informed about u.s. foreign policy and relations with other countries and providing feedback from the public to administration officials.providing  automobile registration  for non-diplomatic staff vehicles and the vehicles of diplomats of foreign countries having  diplomatic immunity  in the united states