The Invasion of Poland was the marked beginning of WWII. Hitler sent troops, air force, and ships to invade Poland.
Japanese Forces attacked Pearl Harbor (A US Naval Base) on December 7, 1941 that surprised all of US. At the time, the Japanese and US had a rivalry for decades.
The Battle of Midway was a naval battle in the Pacific Theater of WWII. This took place six months after the attack of Pearl Harbor.
This battle was the largest meeting point of World War II where Germany and the allies fought the Soviet Union for control of Stalingrad.
D-Day was the day in WWII on which the Allied forces invaded Normandy, France.
V-E Day is the day that marks the Allied victory in Europe.
The United States of America sent two nuclear bombs over the Japanese cities, Hiroshima and Nagasaki.
This day was the day that marked the victory over Japan due to Japan surrendering.