The Battle of Britain was the first major campaign to be fought entirely by air forces, and was also the largest and most sustained aerial bombing campaign to that date. The Battle of Britain marked the first defeat of Hitler's military forces.
Answer:
Apex
Explanation:
it failed to knock Great Britain out of the war, keeping the allied cause alive.
Here's your answer, hope it helps.
the modern day map is secondary
The one that looks the oldest is primary, because primary mean it was made during that time and secondary means it was made after what happened
