Toy Soldiers HD

Can be done in the first level Langemarck. As soon as the level begins click on the British soldier near the bridge to your toy box on the right side. As far as I know, you cant control the flag bearer. To get this achievement just click on him and go into the first-person view of the bearer. It'll take a minute for him to go across the battlefield and climb into the enemy's bunker. You'll know you have succeeded when you get a barrage reward. Achievement should pop as soon as he goes in the dark door.