This is the second mission in which you are playing as Dimitri, the Russian Private, following the admirable SGT Reznov. This is really the beginning of the harder levels, as you will face more and more enemies in broader locations and from more angles.
As you start the level, you are in captivity, under not-so-careful watch of some German soldiers. Enjoy the the mini-scene as you get rescued, and be sure to kill the wounded Krauts before you leave. The next few areas and checkpoints is a wicked grind consisting of you killing several German soldiers and enjoying every minute of it. You will eventually come to a checkpoint where SGT Reznov will ask you to go right or left. In my experience, the path to the right seemed a bit easier, and offered a bit more cover.
From this fork, you will have a long time before you reach another checkpoint. I don't understand why the missed the ball on this one, but it will be a considerable struggle. Taking the right path will guide you through a tight trench that is well-guarded, but easy to get through. Going left is a more open field and requires much patience and dedication. You will eventually get to the same spot going either way, and you will be in a deep set of trenches that zig-zags around until you get under the bridge. Your next checkpoint is under that bridge. This area is a long haul, filled with hails of grenades and German soldiers.
Once you make to the bridge, you will have 3 enemies rush you. Take them out and head to the building to your left and up the hill. There will be a rocket launcher waiting for you, as well as 4, yes 4, tanks to confront mingled will infantry. The first 2 tanks are actually quite easy, and can be nailed from behind some cover on the second floor of the building. (Go around to the enemy side to go up the stairs)
I found that taking the first 3 out, and then staying way left of the map and moving slowly forward prompts the allies to mop of the scattered cannon fodder that are coming at you. Once you have made it to the the building that has the tank on the opposite side, you should clear out the bottom floor of that building and destroy the last tank through the windows of the building.
Reznov will have you meet up at the next building where a tank will burst out the doors. Nail it with 2 rockets quickly, or you will have to do most of the last bit over again.
Move through the building and get ready for a short tank ride. Once you reach the final tank destination, you will have one last push to finish the level. This area is ripe with towers that have mounted machine guns, trucks full of enemies, and plenty of grenades. However, you have plenty of cover, and plenty of checkpoints. I found the best tactic was to stay on the right side, moving slowly and getting your allies to push up the middle of the camp. This is a long push, and will take many tries, but once you reach the end, you will be able to mop up the enemies by shooting them in their fleeing backs. Once the tank at the road is destroyed (you don't have to do it), the mission ends, and you are 30gs richer.
Watch the videos for a general idea.