The main objective is to evacuate the wounded Soap to Nikolai's chopper. At first they shoot their way towards a weapon cache where Yuri will be operating a UGV (Unmanned Ground Vehicle) and they use that to clear a path to the helicopter where Yuri is left behind but eventually gets to the chopper after nearly drowning in a river.
This mission has: Soap, Price, Nikolai, Space, Smith, Scope, and Niner