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Great Britain declared war on Germany in September 1939 after Germany invaded Poland.

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Q: When and why did Great Britain enter World War 2?
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Related questions

When did Great Brittain enter World War 2?

Great Britain entered World War 2 in 1939 after Germany invaded Poland.

Why did the French enter World War 2?

They and Great Britain had committed to the defense of Poland.

Why did Japan enter World War 1 on the side of Great Britain?

Japan wasn't in WW1.

Did the us enter World War 2 after great Britain?

yes, Britain entered the war at the beginning, the united Staes entered the war over two years later.

What event caused Great Britain to enter war?

what war?World War 1NovaNet: Germany invaded Belguim in order to march into Framce.

What war is Great Britain World War I or World War 2?

Great Britain, or more correctly The United Kingdom of Great Britain and Northern Ireland, was involved in both World War 1 and World War 2.

How might the war have been different if great Britain had entered the war?

They did enter the war.

What war did the US enter into with Great Britain early in the nineteenth century?

The US and Great Britain fought a war in the early 19th century known as the War of 1812.

What lesson Britain learn after the Great Britain war?

world war 1

What country was controlled by Great Britain at the beginning of World War I?

There were many countries that were controlled by Great Britain at the beginning of World War 1.

What war did the US enter into with great Britain in the early nineteeth century?


Which nations neutrality was broken causing great Britain to enter the war?