Hunting
Sam is having the most leisure hunt in his life. The people inside don't know about the speed of the harbinger or the existence of the Bee-puppets.
They are searching high and low, they don't know how Sam is killing them, or sometime, they don't even know if Sam killed any of their comrades. After all not every attack gives of an explosion like a grenade.
Most of the deaths are swift and silent with the sharp shots that are being fired at them and Sam is never late to collect the corpses before other people could notice the situation.
By night, Sam has hunted down around fifty soldiers and only used the grenades for five times.
As he hunted he was quite amazed by the forest. These fifty people are at the borders of the forest and most likely the surveillance for the main force hiding inside deeper.
Sam decided to continue his hunt, this would be easier at night.