A smart foreign enemy waits until the domestic enemies have hollowed out the homeland—and then attacks.
That makes the domestic enemies doubly dangerous—and job one.
The Roman Empire was a classic example.
A seemingly endless succession of corrupt and evil Emporers made foreign invasion feasible.
That was silly.
You think that is what the world’s nations do, nothing?
Can you think of any current wars and recent wars and in our lifetime wars and in our father’s lifetime wars, and back through time wars where the enemy did not just wait patiently for whatever nation they wanted defeated to hollow itself out?