On September 25th, against the urging of the United States and other allies, the Kurdish Regional Government (KRG) held an independence referendum within the boundaries of its autonomous region and provocatively, without, in the city of Kirkuk. While the regional response was fast and furious, the United States did nothing, leaving the Iraqi Kurds at the mercy of a revengeful Baghdad: Erbil and Sulaimaniyah airports were closed to international commercial traffic. Turkey threatened to close borders and the Iranian and Iraqi militaries conducted joint exercises on the Iraqi Kurdish border. Baghdad sent the Iraqi army and Iranian-backed Shia Popular Mobilization Front (PMF) militias to retake the disputed territories back from the Kurdish peshmerga. Then, on October 29th, KRG president Masoud Barzani stepped down and suspended the post of presidency, distributing control of the KRG to other branches.