The Munich massacre refers to a tragic event that occurred during the 1972 Summer Olympics in Munich, Germany. On September 5, a Palestinian terrorist group called Black September took eleven members of the Israeli Olympic team hostage. The situation escalated, leading to a standoff with German authorities. After a failed rescue attempt, all eleven hostages were killed, along with a German police officer and five of the terrorists. The incident shocked the world and highlighted the ongoing conflict between Israel and Palestinian groups, leading to increased security measures at international events.