President Trump said that the US leaves Iraq with a 'wonderful' prime minister. Iraqis celebrated the departure, though many feared any security vacuum could boost Iran-backed militias or open the door to an Islamic State return ▻ ↧ Joy mixed with fear as US forces quit Iraq leaving potential securi... Iraqis celebrated the departure of US forces after more ​than two decades of war on Wednesday, though many feared that any security vacuum could increase the power of Iran-backed militias or provide an opening for the return of Islamic ‌State.