Objective 4 : Find the secret communications room.

Return to the ground floor and proceed to the hallway with large double doors.

Be ready as two Germans will appear and shoot at you when the doors open. Eliminate them with the BAR.

Turn on the Iron Sights (a targeting aid) and move forward slowly.

You will see two Germans on a balcony in the upper right corner of the door. Move forward until you can target their torsos and shoot both of them. They should fall over the railing, dead.

Enter the next room and take cover (press the cover button to crouch behind walls or objects) behind a pillar, crouching down.

Use the Thompson to shoot at the Germans who run into the room by the staircase.

Go up the stairs and move down the hallway, shooting any Germans that approach.

At the end of the hallway, stop at the door and aim with the BAR.

Shoot the three enemies on the balcony.

Continue aiming to shoot the German who is behind the next doorframe. Aim for a headshot (a critical hit to the head); if unsuccessful, throw a grenade near him.

Proceed and shoot the two Germans positioned just outside the door leading to the next hallway.

Continue until you enter a room containing a fireplace and a medium-sized table.

Locate a bust of an eagle on a wooden stand. Approach it and press the "F" button to rotate it, which will open the secret doorway to the communications room.