When Loki launched his attack on Earth, Stark called Rhodey hoping that he could provide help, but War Machine was fighting terrorists in Asia so wouldn't be able to get to New York in less than an hour.
He destroys all of the suits and undergoes surgery to remove both the shrapnel and the Arc Reactor.
Mike is still a mod over there as it stands and while some criticism has been allowed in recent months there was zero tolerance before many topics still get deleted regularly.