Bravo Two Zero was the call sign of an eight-man British Army Special Air Service (SAS) patrol, deployed into Iraq during the First Gulf War in January 1991. According to Chris Ryan's account, the patrol was given the task of gathering intelligence, finding a good lying-up position (LUP), setting up an observation post (OP), and monitoring enemy movements, especially Scud missile launchers on the Iraqi Main Supply Route (MSR) between Baghdad and North-Western Iraq; however, according to Andy McNab's account, the task was to find and destroy Iraqi Scud missile launchers along a stretch of the MSR.