What are the sets of numbers??
Answer:
The USA joined WWII after Pearl Harbor( 7th Dec 1941)
Explanation:
Before Pearl Harbor, FDR wanted the USA to join WWII on the side of the allies but he was unable to convince Congress. Weapons were exported to Great Britain but no military move was taken. After the Japanese attack, the USA declared war on the Axis(Germany, Italy and Japan)
I believe it was a military campaign created in the second World War. I think the Raf (Royal Air Force) the United Kingdom's Air Force, was created to defend against the German's Air Force the Luftwaffe. It was famous because it was the first big campaign fought only by airplanes. Hope this helped:)