Call of Duty 2: Big Red One

In the first tank mission in Africa, there is a Flak 88 gun that will destroy one of your tanks. The gun is on the right side inside a building and is not visible. Shoot the second building on the right side. It is the tallest one and will start to crumble when hit. Also, some of your troops are on the right side. Do no run them over. They will help you by taking out the other Flak 88 gun. All you have to do is take out the two machine gunners on the right side after the first Flak 88 gun.

Sometimes enemies will just keep coming unless you move up. Keep moving forward to cover when you are not under fire.

At the end of the bomber mission, you will get to choose any machine gun turret to defend the plane from. It is recommended, at least on the hard difficulty setting, that you stay at the back turret. It takes too long to get to the front, and your plane may get shot down.

Win the indicated battle on the map to unlock the corresponding character:

Oran - Denley
Oran - Bloomfield
Oran - Kelly
Oran - Hawkins

When Brooklyn says "Finally, this crappy mud pit is ours!", start running away from where you came. Equip a BAR or another MG while running. You do not have to worry about the tank dealing damage and can concentrate on the Nazis on your way.