Columbia subject headings:
Iraq--Ethnic relations.
Islam and politics--Iraq.
Shīʻah--Relations--Sunnites.
Sunnites--Relations--Shīʻah.
Harvard subject headings:
Ethnicity--Arab countries.
Ethnicity--Iraq.
Iraq War, 2003-2011
Iraq--Ethnic relations.
Princeton subject headings:
Ethnicity--Arab countries.
Ethnicity--Iraq.
Iraq War, 2003-2011.
Iraq--Ethnic relations.