Jedi Massacre

This was an event that involved the massacre of Luke Skywalker's new generation of Jedi. It started when Han Solo and Leia Organa sent their son Ben Solo (who would soon be known as Kylo Ren) to the academy to be trained by Luke to become a Jedi. Ben instead founded the Knights of Ren and together they slaughtered every last Jedi in the order, forcing Luke to go into exile on the remote oceanic planet Ahch-To. When Rey touched Anakin and Luke Skywalker's old blue-bladed lightsaber in the basement of Maz Kanata's castle, she experienced a hallucination that involved witnessing the Jedi Massacre. She saw Kylo and the Knights of Ren standing around the corpses of hundreds of dead Jedi, before she came out of the hallucination.