Demographics of Iraq
97% of Iraqis follow Islam: 61% Shia and 34% Sunni. 1% of these describe themselves as "Just a Muslim". According to the CIA Factbook, Shias make up 60% of population, while Sunnis 35%. Christianity accounts for 5%, and the rest practice Mandaeism, Yazidism and other religions.
Sons of Iraq
The Sons of Iraq were virtually nonexistent by 2013 due to former Iraqi Prime Minister Nouri al-Maliki's unwillingness to integrate them into the security services. Sunnis formerly serving with the group were faced with options including becoming unemployed or joining the Islamic State of Iraq and the Levant.