go to the right pill box when you go down the trench go straight but dont go into the pillbox you should see a path going to the right go down there you should be in a tiny room with a desk and a crate on top of the crate should be a machine gun take it unleash havoc!!!
In the American level right after the sewers, you will go up the stair and come to a room with four germans. To the left is a closet sized room that has an MP40 and a stuffed bear. Pick up the bear to restore some health lost in the last level.
In the tunnel on your way to the tractor factory if you look at the walls threw the sewrage pipe you should notice a wall that is either made of wood or is lighter or darker than the rest of the wall if you throw a grenade at it, the wall should explode and there is a load of ammo and health there pick it up and enjoy!
When you are on the russians side and when your the sinper going to the factory from the sewers to help defend the tank this is for you.When at the start just running to it just stay there and let the other people go.You can't hear anything I don't think.I've done it and stayed in the sewer part for 10 mins before they came to attack us!
Hope this works.It might have been a glitch but it's always good to try!
I have a few hints and tips that may help you through the game.
1. When you're on a tank mission, ALWAYS make sure you have killed all German soldiers with Panzershrecks in the area. Because otherwise they will come together and start firing numerous shells at you, hence you will die so quickly.
2. When in a tank, look behind you from time to time. Because I have noticed that German soldiers and tanks sometimes come up from behind.
3. When you play as a foot soldier, gather as much first aid kits as you can, (I think the maximum number is 4). These will be extremly useful when you are fighting a large group of German soldiers and need some health bad!