[Deadmeat]

You need to take out all the germans on your side of the bridge first - but avoid either tower on your side till you're ready to defend the bridge.

Then go up to either tower and kill anyone in it (I picked the one on the left facing the bridge, because it seemed I had a better sniping spot). Then you'll get a voice promt telling you to snipe any germans running up to the detanation box. Kill all germans with your springfield so they don't blow the bridge. Eventually, I believe your friendly tank will shoot the box, so you don't have to worry about it any more. Then German tanks start rolling in down the streets parallel to you on the other side of the bridge. You'll get a voice prompt to call in artillery on them. Switch between the binoculars for artillery, and your springfield to snipe pesky germans trying to stop you from destroying their tanks.

Hope this helps!

-Deadmeat