How did World War 2 begin?

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What Started WW2
The question "How did World War 2 start?" or "What started World War 2?" can be considered distinct from "What caused World War 2?" For the latter, see the Related Question link.

There are many views on exactly when and where World War 2 started, and what started it.

 The War in Europe
One view is that there was only one world war. It started in 1914 and finished in 1945, with a break from 1918-1939 while the Germans regrouped. (Kaiser Wilhelm, or at least the German General Staff, had similar foreign policy aims to those of Hitler: a vast program of expansion with visions of world domination.) However, this view of one long war, with a 20 year truce is often not meant literally, and needs treating with caution. Hindsight easily distorts. It is inaccurate to view the whole of the interwar period as one vast build-up to World War 2.More commonly, people believe World War 2 started in 1939. On 1 September 1939, Hitler and the Nazis faked a Polish attack on a minor German radio station in order to justify a German invasion of Poland. An hour later Hitler declared war on Poland stating one of his reasons for the invasion was because of "the attack by regular Polish troops on the Gleiwitz transmitter."
France and Britain had a defensive pact with Poland. This forced France and Britain to declare war on Germany, which they did on September 3.

 The War in the Pacific Some say World War 2 started in late 1931 with the Japanese invasion of Manchuria. This is sometimes referred to as the Mukden Incident. The major invasion of China by Japan was in 1937.
Japan had long been coveting mainland resources, invading China and (en route) Korea for centuries. Under the guise of The Co-Prosperity Sphere (8-Lands Under One Umbrella), Japan plotted an imperial takeover of Asia and the Pacific in the style of Western imperialism less than a century earlier.
The US opposed this movement and placed embargoes on Japan. Searching for supplies and rebelling against US intervention, Japan embarked on its Oriental conquest. Hoping to keep the US Air Force out of Japan's way, Admiral Yamamoto led the attack on Pearl Harbor. Unfortunately they opened fire 30 minutes before the proclamation of war was officially delivered, so many viewed it as a violation of military convention (Adm. Yamamoto regretted this fact; he admired Western military practices).
Note that one reason many people say WWII started in 1939 by Hitler's invasion of Poland instead of by Japan in 1937 is because the former is the moment when the first main Allied nation declared war on an Axis nation (Britain declares war on Germany). Rather than be specific and say the first shots of origin started with Japan's invasion, it is pointed out that no main Allied nation had declared war at that time.  The War in Africa Some people consider the war in Africa as starting with the 1935 invasion of Ethiopia by Italy. However, few Italians take the view that Italy was at war from 1935-1945.
Here's more from Wiki s contributors:
  • For the European Theater it began with Germany's attack on Poland which drew England and France into the fray. Pearl Harbor marked the start of the Pacific Theater. Germany's declaration of war against the US folded them together into a worldwide conflict.
  • It began when Britain and France declared war on Germany in response to Germany's invasion of Poland.

Japan bombed US planes and installation at Pearl Harbor, drawing the US into the war.
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How did World War 2 begin in Europe?

World War 2 began in Europe when Britain and France declared war onGermany upon its invasion of Poland. However, Germany had alreadybeen engaging in aggressive acts against it

How did World War 2 begin in the Pacific?

when the janenise spuly ran low and we did not help them so they sined a contract. with the axis forses then bombed pearl harbor and the u.s. declared war.. pearl harbor ata

How did World War 2 begin and end?

It began on the September 1,1939, when Germany invaded Poland. It ended 6 years and a day later with the official surrender of Germany's ally Japan.

When did World War 2 begin and how?

It started September 1939 by the Nazi Germans when they invaded Poland with their tanks, infantry and airplanes. Answer Hitler started to invade other countries and they fou

When does the World War 2 begin?

September 1, 1939 World War 2 started when Adolf Hitler and the German Nazis invaded Poland with military force.

How did the 2 world war begin?

World War 2 started on September 1st, 1939. Germany invaded Poland, acusing the poles of atacking them first, which was not true. It started because Hitler beleived that 1. th

How did world war 2 begin between the US and Japan?

On December 7, 1941, while German armies were freezing before Moscow, Japan suddenly pushed the United States into the struggle by attacking the American naval base at Pearl H
In World War 2

How and when did World War 2 begin?

WW2 began when Germany invaded Poland in September 1st, 1939. America did not join the war until December 7th, 1941 in case you were wondering.
In World War 2

How did world war 2 begin in the pacfic?

America put an oil embargo on Japan because they were taking possessions of other countries to use them against their war with China. In response they bombed Pearl Harbor, and
In US in WW2

How did World War 2 begin and end for the US?

The war for the US began December 7, 1941 with the Japanese bombingof the naval base at Pearl Harbor and Army Air base at Ford Field.The IUS responded immediately by declaring