Did the Eastern Orthodox church have its own crusades and been responsible for ethnic cleansing genocides?

The Roman Catholic church is perhaps better known for starting the crusades against the Muslims in the Holy Lands, heretics such as Protestants and Cathars with inquisitions and at best turned a blind eye to Jewish Pogroms, either on an institutional level or as individual Catholic priests collaborating with the Nazis. Of course there were noble and good priests that stood against this, but here I'm covering the bad acts and rotten apples. I don't get to hear too much about the Eastern Orthodox church, how does their historical record compare?