At the end of the mission where you have to meet Manon in the truck, you have to deal with both dogs and guards from behind and very accurate riflemen ahead of you to escape. To makes things much easier, when you get to the gate stop and crouch. While crouched, no guards will appear from behind as long as you go along the road in that position. Walk until you can snipe the guards up ahead with your KAR98. Once they are all dead, take out your MP40 and turn around. Guard dogs will still be sent from this point onwards. Stay crouched and walk backwards then gun them down as they come to you. This is especially useful under the hard difficulty setting, where one rifle hit takes off 30 health points.