Iraq’s top Shiite cleric, Grand Ayatollah Ali al-Sistani, issued a fatwa on June 13, 2014, encouraging Iraqis to take up arms to defend "their country and their people and their holy places" as well as join the security forces. This fatwa, known as the "righteous jihad fatwa," came after the Islamic State (IS) occupation of Mosul, Salahuddin, Anbar, Diyala and Kirkuk and its threats to occupy Karbala, Najaf and Baghdad, and was a major turning point in the war.
In response to the fatwa, hundreds of thousands of youths, particularly in the Shiite areas, have answered the call of duty. Subsequently, on June 15, the Iraqi government declared the establishment of the all-volunteer popular mobilization forces. Since then, the organization, which Shiite factions have joined, has managed to liberate many of the IS-controlled areas in southern Baghdad, Diyala and Salahuddin.