For Example:
What was going on in Europe on 12/7/41 or during any major battle
What was happening in the Pacific on D-Day
For Example:
What was going on in Europe on 12/7/41 or during any major battle
What was happening in the Pacific on D-Day
Starting on 12-6-1941 was actually the Soviet counter attack on German forces around Moscow. So fairly big thing but dwarfed by the events at Pearl Harbor.
Now 6-6-1944 was the day after the allies entered Rome and there was still much celebration in Rome on D-Day. The Pacific was fairly quiet, by this point in the war, Japan was on the defensive and the allies did nothing major.
Lets go to another June 6th. Battle of Midway on June 4-7, 1942: In Africa, Rommel was in the middle of the 25 day Battle of Gazala where he handed the Brits a major defeat.
Wikipedia is a good place to start. Every day of the year has its own article, and you can see what was happening on any date from 1939-1945.
https://en.wikipedia.org/wiki/June_6
https://en.wikipedia.org/wiki/December_7