In January 2016, the USAF was "indefinitely freezing" plans to retire the A-10 for at least several years. In addition to Congressional opposition, its use in anti-ISIL operations, deployments to Eastern Europe as a response to Russia's military intervention in Ukraine, and reevaluation of F-35 numbers necessitated its retention. In February 2016, the Air Force deferred the final retirement of the aircraft until 2022 after being replaced by F-35s on a squadron-by-squadron basis. In October 2016, the Air Force Material Command brought the depot maintenance line back to full capacity in preparation for re-winging the fleet. In June 2017, it was announced that the aircraft "...will now be kept in the air force’s inventory indefinitely."