Objective 2 : Find a way into the Chateau.

To get into the Chateau, make your way around the back on the left side.

Move along to the point at which an enemy truck pulls up in a courtyard in the north part of the level, taking out all enemies on the way.

Warning: When the truck pulls up, make sure to crouch and only advance further into the courtyard after killing all the Germans in your present field of view (the area you can see).

There is another truck on the far side of the courtyard, so don't let your guard down after eliminating the occupants of the first truck.

When you have killed all of them, you can move further along and climb up the ladder you see leaning against the wall of the Chateau.