Bravo Two Zero was the call sign of an eight-man British Army SAS patrol, deployed into Iraq during the First Gulf War in January 1991. According to Chris Ryan's account, the patrol were given the task of gathering intelligence, finding a good lying-up position (LUP) and setting up an observation post (OP) on the Iraqi Main Supply Route (MSR) between Baghdad and North-Western Iraq, while according to another, the task was to find and destroy Iraqi Scud missile launchers along a 250 km (160 mi) stretch of the MSR.