Upon gaining control, smash the guard over the head with your rock and help the other prisoners escape. You'll soon grab a knife which you can use to stab guards on the way out. When you reach the outside, the prison guards will be packing guns and even a heavy machinegun. Grab the pistol on the floor and follow Reznov behind the mine carts. The guards will alternate the sides they come from; kill two on the right, kill two on the left, and so on.
Eventually the machinegun nest will be taken out and you can proceed to the next area. Climb up the tower and you'll be manning a slingshot. Use it to destroy the three targets in the distance. Remember, that it's the bottom of the cross hairs where the flaming garbage will land, not the center of the reticule. Afterwards, go back to the ground level and equip a shotgun to blast through the next gate.
Charge through and destroy the vehicles, causing them to explode and take out enemy enemies in the way. Keep moving forward and grab the fallen harpoon gun. Fire this new item straight at the helicopter ahead and clear the zone. Enter the next building and wait for the guards to move forward. They are using shields that will block your shots in a straight up fight. Instead, wait for them to get close and move behind them, exposing their weak meaty flesh.
The guards will attempt to close the blast doors, so charge to the next level and to the right. Open the door so your allies can get inside. They will kill off the machine gunner above you, allowing you to rush the other enemies that enter from the ceiling. Support Reznov and he will grab a blow torch. Get his back and kill the guards that enter from the broken gate and windows.
Reznov will use the torch to open a vault in the previous room. Protect him and take some cover your self. A good place to wait is in the corner, allowing you to shoot enemies that enter from both sides. Inside the vault is a mini gun that will help you destroy ever thing insight. Move forward and use your new toy to destroy ever vehicle and soldier along the way. Be sure to aim towards the windows above, as enemies with rockets will be perching over you.
After a cut scene, you'll have access to a motor bike. Get on and race across the tracks below. Follow Reznov and blast the enemies with your pistol. Head to the truck firing on you and take out the gunner. As you move close, Reznov will jack the driver seat while you man the gun. Destroy the helicopter, and trucks that come by. Finally, a train will arrive from the right. Jump onto it to make your escape and end the mission.