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==Causes==

==Causes==

The causes of World War II are complicated. The immediate causes of World War II are generally held to be the Japanese attacks on China, the United States, the British and Dutch colonies and the German invasion of Poland. World War II began after these acts of aggression were met with an official declaration of war, armed resistance or both.  

The causes of World War II are complicated. The immediate causes of World War II are generally held to be the Japanese attacks on China, the United States, the British and Dutch colonies and the German invasion of Poland. World War II began after these acts of aggression were met with an official declaration of war, armed resistance or both.  

== German Tactics ==

== German Tactics ==

The major tactical innovation of the war was the use of combined arms warfare, typified by the German doctrine of [[blitzkrieg]]. In this style of warfare armor, infantry, artillery and air power all coordinate to achieve overwhelming superiority at point on the enemy lines. Armor and fast-moving infantry units then exploit the gap and penetrate deep behind enemy lines. The objective is to cause a widespread collapse of the enemy's ability to fight. It was particularly effective during the early stages of the war, before the Allies developed effective countermeasures.

The major tactical innovation of the war was the use of combined arms warfare, typified by the German doctrine of [[blitzkrieg]]. In this style of warfare armor, infantry, artillery and air power all coordinate to achieve overwhelming superiority at point on the enemy lines. Armor and fast-moving infantry units then exploit the gap and penetrate deep behind enemy lines. The objective is to cause a widespread collapse of the enemy's ability to fight. It was particularly effective during the early stages of the war, before the Allies developed effective countermeasures.

==The end of World War II in Asia==

==The end of World War II in Asia==

On August 6, 1945, a B-29 Superfortress, the Enola Gay, dropped a nuclear bomb on Hiroshima. Then, on August 9, a B-29 dropped the second atomic bomb. On August 20 the Japanese government told the United States they were ready to accept the terms which the Allies proposed. The next day, the Allies replied, saying the authority of the emperor would be "subject to the Supreme Commander of the Allied Powers." On August 14 the Japanese government agreed to this.

On August 6, 1945, a B-29 Superfortress, the Enola Gay, dropped a nuclear bomb on Hiroshima. Then, on August 9, a B-29 dropped the second atomic bomb. On August 20 the Japanese government told the United States they were ready to accept the terms which the Allies proposed. The next day, the Allies replied, saying the authority of the emperor would be "subject to the Supreme Commander of the Allied Powers." On August 14 the Japanese government agreed to this.