Europe is finished.
Decline and Fall of the West.
The 'start' of the disintegration and fall of the Western Roman Empire started when the emperor Valens let in hundreds of thousands of barbarian refugees fleeing from Attila the Hun.
These 'refugees' eventually started carving out their own territories within the borders of the Roman Empire and taking vital income from the government.....eventuall y the government was near bankrupt and could no longer afford to field proper Roman armies anymore for their own protection.
Once the enemy has settled in your own borders, its over.