The Expendables track The Sangs and stayover in a pseudo-American town built deep into Russia during the Cold War. The Sangs hear that Barney's men are around and show up the next morning to pin them down, bringing out a tank to finish them off.
The Lone Wolf, Booker (Chuck Norris), rescues them single-handedly, and recommends they visit a little town up the road instead.
At the next stop they find a village full of women, whose men have been kidnapped by the Sangs and forced to work in a mine by Vilain (Van Damme) to find the nukes.
They wait for The Sangs to return to take the young boys they left behind last time, and finish off the raiding party.
Barney and his men roll up to the mine in the big plane and take aim. They crash-land inside just as Vilain detonates explosives, bringing the roof down.
They are rescued by Trench (Arnie) and Church, and given a new ride to take out Vilain before he makes it out the country.
Vilain is already making good progress with his convoy, but The Expendables catch up with him at the airport.
There is a huge standoff, but The Expendables have better guns (and Arnie, Chuck Norris, Bruce Willis and the crew), and soon decimate the bad guys.
Barney follows Vilain out the back to face-off alone. Vilain is nifty with a knife, and his boot, but Ross is tougher and finishes the job with the help of a chain - pulling him closer and using Billy's knife to stick it in his chest.
Ross takes Vilain's head with him to show Church as proof of death, and now they're even ... and even get a little crop-duster plane as a thank-you present.
They post a gift for Billy's fiancee in Paris, while The Expendables offer a toast for their fallen friend on the ride home.