Columbia subject headings:
Harvard subject headings:
Economic sanctions, American--Russia (Federation)
Europe, Eastern--Foreign relations--United States.
Europe--Politics and government--1989-
Geopolitics--History--21st century.
Political stability--History--21st century.
Russia (Federation)--Foreign relations--Ukraine.
Russia (Federation)--Foreign relations--United States.
Ukraine--Foreign relations--Russia (Federation)
United States--Foreign relations--Europe, Eastern.
United States--Foreign relations--Russia (Federation)
Princeton subject headings:
Economic sanctions, American--Russia (Federation).
Europe, Eastern--Foreign relations--United States.
Europe--Politics and government--1989-
Geopolitics--History--21st century.
Political stability--History--21st century.
Russia (Federation)--Foreign relations--Ukraine.
Russia (Federation)--Foreign relations--United States.
Ukraine--Foreign relations--Russia (Federation).
United States--Foreign relations--Europe, Eastern.
United States--Foreign relations--Russia (Federation)