Final answer:
To determine when France's deterrence of Germany has failed, we can look for several key indicators: if Germany successfully launches an attack on France despite the French buildup, if France's defensive fortifications are bypassed or rendered useless by German tactics, and if Germany occupies French territory.
Step-by-step explanation:
To determine when France's deterrence of Germany has failed, we can look for several key indicators:
- If Germany successfully launches a military attack on France despite the French buildup of their military forces, it can be considered a failure of deterrence.
- If France's defensive fortifications, such as the Maginot Line, are bypassed or rendered useless by German military tactics, it suggests that France's deterrence has failed.
- If Germany is able to occupy French territory or achieve significant military and strategic gains in spite of French efforts to deter them, it indicates a failure of deterrence