Grenzschutzgruppe 9 der Bundespolizei (Border Protection Group 9 of the Federal Police), commonly abbreviated GSG 9 is a German counter-terrorism and special operations unit.
On September 5, 1972, the Palestinian terrorist movement Black September infiltrated the Summer Olympic Games in Munich, West Germany, to kidnap 11 Israeli athletes, killing two in the Olympic Village in the initial assault on the athletes' rooms. The incident culminated when German police, neither trained nor equipped for counter-terrorism operations, and underestimating the number of terrorists involved, attempted to rescue the athletes. Police did not have a specialized tactical sniper team at that time. The army had snipers, but the German Constitution did not allow the use of the German Armed Forces on German soil. The police rescue failed and the operation led to the deaths of one policeman, five of the eight kidnappers and all of the remaining nine hostages (subsequently called the Munich massacre). Apart from the human tragedy, Germany's law enforcement found itself severely compromised, in part due to Germany's historic relationship to Jews and Israel.