The tragic incident referred to as the Trillia Massacre took place on the planet Trillia. It involved the perilous dwarf rathtars, which represent a subspecies of the larger rathtar species. A significant number of individuals met their death during this massacre, becoming prey for the ravenous rathtars. Finn had knowledge of this horrific event and expressed his hope that Rey remained unaware of it, given its notoriety for being exceptionally gruesome and immoral. Ultimately, it was confirmed that she had not heard of it when they were in conversation about the three rathtars that the smuggler Han Solo, along with his co-pilot Chewbacca, had transported onto the Eravana.