The United States enters World War II after the Japanese attack on Pearl Harbor, marking full American involvement in the global conflict.
The United States establishes the Eighth Air Force, responsible for daylight strategic bombing operations over Nazi-occupied Europe.
Allied strategic bombing campaign targets German military and industrial facilities to weaken Germany's war capacity, the backdrop for many missions depicted in Twelve O'Clock High.
The movie 'Twelve O'Clock High' is released, depicting the challenges and heroism of American bomber crews during World War II.