The mission failed and you had to flee. The members of the unit were forced to split up so that at least someone had a chance of survival.

You ended up teaming up with Colonel Koenig.

Making your way through a snowstorm, you had to drop an extra load of equipment in order to have the strength to get to the shelter, which became a cave in the rock.

"This way. Let's hide there for a while," the colonel commanded, dragging you into the cave.