7 Days to the Wolves

Could it not also reference a coming invader? Scandinavian armies at one time employed fighters called berzerkers, who went into battle on adrenaline rush and would not stop until they were killed, or the enemy obliterated. They were said to be imbued with the spirit of bears or wolves when they fought, and often times they wore their pelts into battle. To me it seems as if he's waiting for an invasion. "Seven days to the wolves" Seven days until the enemy arrives and we're all killed. "This is where heroes and cowards part ways". Some will stay and fight, while others will flee.