In Star Wars canon, all we really know about the Ghorman Massacre is that it involves civilians slaughtered by stormtroopers, and it's what prompts Mon Mothma to openly go against the Emperor in a speech before she ends up joining the Rebellion openly. This is depicted in Star Wars Rebels season 3, episode 18.

THERE ARE SOME truly great pieces of work in the history of the Star Wars canon. The original film—which was at first known simply as Star Wars and has since been renamed A New Hope—is one of the most influential movies of all time,

The franchise from a galaxy far, far away has always echoed current events. Once again, it’s a space opera for our times.