How do you enter the fortress? I have destroyed all tanks and personal. I have blown up the gate to the sewer system under the fortress, however the game will [b][/b]not let me enter the sewer system. I have all four of my special forces at the entry to the sewer system.

Try that again but when you blow the sewers gats an Iraqi chopper should appere destroy that enter the sewers and it should say level complete or what ever it says

I can't get into the fortress on "Counter-Attack." I take out the machine gun nests, take out the tanks, all the guys that run at me, and i searched around every wall, and i can't find the way in. HELP!

at the main menu press the following buttons in order
squarex2 circlex2 L1x2 R1x2 L2x2 R2x2.this will unlock the cheats menu which can be found in the game options menu.