On August 18, 1940, the Luftwaffe launched massive raids on RAF targets in southern England, destroying 68 British aircraft in an event dubbed with what moniker?

On August 18, 1940, the Luftwaffe launched massive raids on RAF targets in southern England, destroying 68 British aircraft in an event dubbed with what moniker?

The Reckoning
The Full Catastrophe
The Hardest Day
The Dog’s Dinner
The Longest Day

The correct answer is The Hardest Day