Holy Shrine Defenders: Kata'ib al-Imam Ali (PBUH)

Kata'ib al-Imam Ali  also known as the Imam Ali Battalions, are the armed wing of the Islamic Movement of Iraq (Harakat al-Iraq al-Islamiyah) and serve as part of the umbrella organization "Popular Mobilization Forces", Kata'ib al-Imam Ali is prominently involved in the Iraqi Civil War, fighting against the Islamic State of Iraq and the Levant. 

Abu Azrael is one of the most well-known senior leaders of this fighter group.