What Was the History of World War II?

World War II was a global conflict that lasted from 1939 to 1945. It was the deadliest conflict in human history, with an estimated 50 million to 85 million fatalities. The war involved the majority of the world’s nations, including all of the great powers, organized into two opposing military alliances: the Allies and the Axis.

The Causes of World War II

The causes of World War II can be traced back to the Treaty of Versailles, which ended World War I. The treaty imposed heavy reparations and restrictions on Germany, which led to economic and political instability in the country. Adolf Hitler and his Nazi Party took advantage of this instability and rose to power in Germany in 1933.

Hitler’s aggressive foreign policies, including his annexation of Austria and invasion of Czechoslovakia, ultimately led to war. On September 1, 1939, Germany invaded Poland, prompting Britain and France to declare war on Germany.

The Major Powers Involved

The major powers involved in World War II were:

  • The Allies:
    • United States
    • United Kingdom
    • Soviet Union
    • China
  • The Axis:
    • Germany
    • Italy
    • Japan

The Major Events of World War II

There were several major events that occurred during World War II:

The Battle of Stalingrad:

The Battle of Stalingrad was a major turning point in the war. It was fought between August 1942 and February 1943, and resulted in a decisive victory for the Soviet Union. The battle was one of the bloodiest in human history, with an estimated 1.5 million casualties.

The D-Day Landings:

The D-Day landings were the Allied invasion of Normandy, France on June 6, 1944. The invasion involved more than 156,000 American, British, and Canadian troops landing on five beaches along a 50-mile stretch of the Normandy coast.

The Atomic Bombings of Hiroshima and Nagasaki:

The atomic bombings of Hiroshima and Nagasaki were carried out by the United States in August 1945. The bombings resulted in the deaths of an estimated 200,000 people and led to Japan’s surrender.

The Aftermath of World War II

The aftermath of World War II included the formation of the United Nations and the beginning of the Cold War between the United States and Soviet Union. The war also had a profound impact on Europe, leading to major political and territorial changes.


In conclusion, World War II was a global conflict that had a profound impact on human history. It was caused by a combination of factors including the Treaty of Versailles and Hitler’s aggressive foreign policies.

The war involved all of the major powers at the time and resulted in millions of deaths. Its aftermath led to significant political and territorial changes around the world.