What's WWII summarized

World War II, often abbreviated as WWII or WW2, was a global conflict that lasted from 1939 to 1945, involving many of the world's nations. It is generally considered to have been sparked by the invasion of Poland by Nazi Germany on September 1, 1939, leading to the declaration of war by the United Kingdom and France on Germany. The war spread rapidly, eventually affecting most countries around the world and was fought on multiple fronts.

On one side were the Allies, predominantly consisting of the United Kingdom, the Soviet Union, the United States, and China. On the other side were the Axis powers, which included Germany, Italy, and Japan. WWII is known for being the deadliest conflict in human history, with an estimated 70-85 million fatalities, including many civilian lives lost through war crimes, the Holocaust, strategic bombing, starvation, and disease.

The main events of WWII include the German Blitzkrieg tactics, the Battle of Britain, the war in the Pacific with the attack on Pearl Harbor by Japan, major battles on the Eastern Front between Germany and the Soviet Union, and the Normandy invasion (D-Day) by Allied forces. The war concluded with the total surrender of the Axis powers. In Europe, the war ended with the unconditional surrender of Germany in May 1945, but in the Pacific theater, the war continued until Japan surrendered in September 1945, following the atomic bombings of Hiroshima and Nagasaki by the United States.