Haddawy took part in the unit's ill-fated mission to Vygoire, assigned to investigate a Dominion lab complex that had stopped responding to hails. Terrestrial and orbital observation showed that while the complex had suffered damage, it appeared to be from natural causes, such as a landslide. As per urban-recon protocols, the facility was investigated, the unit discovering human remains, but no living scientists. During this period, the marines raised their suits' face-plates, as the air was breathable.
The unit continued its recon while its supporting battlecruiser was called out-system for emergency escort duty, set to return when it could. The marines headed into the jungle. Sergeant Norwood Doakes assigned Chen to investigate a clearing that had a lot of bent and scarred trees. After returning to the group, he reported that there were large quadrupedal tracks through the clearing. As if on cue, a roar sounded through the area. It was at this point that Twohy started freaking out, screaming about coordinates, gods, and a "Great One." He ran into the jungle, and an ultralisk came charging back in his place. The creature was fended off with heavy casualties. Doakes called for extraction, but the Scion refused to send down any dropships until the creature was taken out.
It was at this point that the unit was attacked again, this time by the complex's scientists. Their spears did no harm however, and they were apprehended, one of their number ranting on about a "Great One" and how a van Rijn would be sacrificed. Van Rijn himself showed up and claimed the same, prompting Haddawy to claim that he was "crazy."
Torch Seven later laid a trap for the Great One using the cultist scientist's connection to the ultralisk as bait. They would lure the ultralisk into a canyon and detonate a series of vespene barrels there, collapsing the ravine on the ultralisk. Haddway aided in preparations, and vocally wondered where the ultralisk was as they were preparing. The operation was successful, and Doakes lured the ultralisk into the trap, burying it under rubble. He asked Haddway to check for any heat signatures from the creature, but just then it broke free from the rubble and began attacking Torch Seven. In the ensuing battle, the Great One was killed by the combined fire of Torch Seven and a lucky shot by Doakes, but only Vera, Doakes and nine members of Torch Seven survived. It is unknown if Haddawy was among those nine, though they too were killed by Vera upon return to the Scion.