I've heard of the Nuremberg Trials for the Nazis, and also the tribunals which held the Japanese accountable for war crimes in the east.
However, it is inconceivable that the Allied Forces were themselves innocent of any violation of the rules of combat. For instance, they had firebombed Dresden resulting in extensive civilian casualties.
Were there any kind of tribunals set up to hold the Allied Forces accountable as well? And if not, how would it be justified?
I mention in this comment why Dresden is overblown for non-historians.