Solid Snake traversed the mountain trail after Naomi Hunter was taken from the nearby research lab by several members of the PMC Pieuvre Armement. Anticipating that Snake would attempt to follow them, should he escape Laughing Octopus at the lab, Liquid Ocelot had both Pieuvre Armement soldiers and Haven Troopers deployed to stop him. Several traps were set in the area to fool Snake into believing that Naomi was nearby, such as leaving a pink bra in range of a sniper, or playing an audio tape of Naomi inside a shack while a Haven soldier lay in wait, in order to ambush him.