UNSC forces belonging to the 23rd Battalion were sent to Derilaxus 220 to deal with United Rebel Front insurgents who had smuggled a large quantity of UNSC ordinance. However, the 23rd Battalion detachment that was sent, Delta company, was met with continuous attacks from URF forces upon deployment of their Forward Operations Base.
5th MEU Intervention Edit
Once 5th Marine Expeditionary Unit caught wind of Delta company's predicament. They were immediately deployed to reinforce Delta company as well as secure their original objective.