Shortly after the Iraqi government launched a military operation to retake the ISIS-held city of Fallujah, a document allegedly issued by ISIS reveals that the terror organization has been planning to fight for the city by pitting its Sunni majority against Shi'ite Iraqi liberation forces.The document was purportedly issued in May by ISIS' Fallujah province and was recently obtained by the Iran-backed Popular Mobilization Units in the city of Karamah, located 16 kilometers northeast of Fallujah.In the document, ISIS’ leadership in the war-ravaged Fallujah explains to the organization's jihadists how to prepare for the upcoming battle for the city."You should prepare to move your families to safer places outside Fallujah," the first instruction in the document reads."You should plant explosives in the city's houses, mosques and squares, and blow them up before the Shi'ite Popular Mobilization Units and the apostate Iraqi army enter the city. You should spread photos of these explosions and present them as Shi'ite attacks that aim to take revenge against Sunnis," ISIS’ leadership in Fallujah stated.Another attempt by ISIS to sow instability in Fallujah upon leaving the city is the order to jihadists to "masquerade as members of the Popular Mobilization Units by wearing similar uniforms and kill prisoners incarcerated in Fallujah's prisons.""While slaughtering them, you should chant Shi'ite slogans, and then present these executions as if they were carried out by the Popular Mobilization Units," ISIS ordered its fighters.In addition, ISIS’ leadership in Fallujah ordered jihadists to "kill whoever collaborates with the Popular Mobilization Units and the Iraqi army."On Monday, the Iraqi Air Force, in collaboration with the international coalition against ISIS started an aerial campaign against ISIS bastions in Fallujah. These heavy airstrikes resulted in the killing of dozens of innocent Iraqi civilians, which prompted many Arab activists to accuse the Shi'ite Iraqi government of cleansing the country's Sunni population under the guise of the "war against terror."