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On September 1st 1939, Germany invaded Poland. Britain and France had a defense agreement with Poland and demanded that German troops withdraw. Germany didn't respond to the demand so on September 3rd 1939, Britain and France declared war on Germany.
Actually, it was Hitler who declared war (again). England and America prepare for war because they thought it wouldn't end that easily.
Because Germany invaded Poland with whom Britain had a mutual defence pact.

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For what official reason did grat Britain declare war on Germany?

Britain and France had offered a guarantee to Poland that if she was attacked by Germany they would come to her aid. When Germany subsequently invaded Poland, Britain and France gave Germany an ultimatum, demanding the withdrawal of German troops from Poland. Failure to do so would result in a state of war.


When did Britain and France declare war against Germany and why?

Britain and France declared war on Germany on September 3, 1939. The reason was because Germany had launched a military invasion of Poland two days earlier, even though Britain and France had told Germany not to do so.


Which was more important as a reason for Great Britain joining World War I?

The more important reason for Britain joining World War 1 was the Schlieffen Plan, that Germany had written up. The plan involved Germany attacking on two fronts; Russia and France. Almost immediately this would of set sparks off within the Triple Entente; Great Britain, Russia and France. The biggest fault of the plan was that Germany would have to go through Belgium to attack France. In 1839, Britain signed a treaty with France stating that they would help Belgium, who were neutral, if they were ever invaded. With Germany wanting to pass through Belgium, Britain were forced to declare war on Germany, something which the Germans had not expected at all. If Britain had left it, essentially Germany would of invaded both France and Belgium, and then would of been able to invade Britain from the South. Germany could of won World War One if Great Britain didn't attack.


What is one reason the US sided with Britain during World War 1?

The United States shared a common language and literature with Britain


What was the Most important reason Britain defeated Germany?

Because Britain was allied with much more powerful countries: the USSR and USA.

Related Questions

What official reason did Britain declare war on Germany?

Britain declared war on Germany because Germany attacked Belgium in order to strategically invade France. Britain vowed to protect Belgium, so Britain joined World War I.


For what official reason did grat Britain declare war on Germany?

Britain and France had offered a guarantee to Poland that if she was attacked by Germany they would come to her aid. When Germany subsequently invaded Poland, Britain and France gave Germany an ultimatum, demanding the withdrawal of German troops from Poland. Failure to do so would result in a state of war.


Why did Germany declare war on Britain in World War 1?

The specific reason was that German forces invaded Belgium on their way to France. Britain, France and Prussia (the key forerunner of Germany) had guaranteed Belgian neutrality in 1839 (and again in 1875). Moreover, Britain was an ally of France and was not willing to let a substantial part of the coast opposite Britain fall into unfriendly hands.


When did Britain and France declare war against Germany and why?

Britain and France declared war on Germany on September 3, 1939. The reason was because Germany had launched a military invasion of Poland two days earlier, even though Britain and France had told Germany not to do so.


The main reason for the formation of the US was to?

declare our independence from Britain


What official reason did Great Britain declare war on Germany?

On September 1st 1939, Germany invaded Poland. Britain and France had a defense agreement with Poland and demanded that German troops withdraw. Germany didn't respond to the demand so on September 3rd 1939, Britain and France declared war on Germany.Actually, it was Hitler who declared war (again). England and America prepare for war because they thought it wouldn't end that easily.Because Germany invaded Poland with whom Britain had a mutual defence pact.


Why France and Great Britain declared war on Germany?

When did England and France declare war on who? Please clarify.


Why did Britain declare war on Germany world war 1?

The specific reason was that German forces invaded Belgium on their way to France. Britain, France and Prussia (the key forerunner of Germany) had guaranteed Belgian neutrality in 1839 (and again in 1875). Moreover, Britain was an ally of France and was not willing to let a substantial part of the coast opposite Britain fall into unfriendly hands.


Did great Britain almost declare war on America during world war 2?

No. What possible reason would Britain have had for that?


Which of the following persuaded Great Britain to declare war against Germany starting World War 1?

You don't mention the options you were given, but the formal reason was that Britain was bound by the Treaty of London of 1839, in which it undertook to 'defend' Belgium if it were ever attacked. The British explicitely mentioned this Treaty in their war declaration against Germany.


Great Britain's stated reason for declaring war on Germany in 1914 was the?

Great Britain declared war on Germany in response to there invasion of Belgium.


What issues arose between Germany and the countries of France and Great Britain that ultimately lead to war?

Belgium was the cause of friction between Great Britain and Germany in WW1. Belgium and Great Britain were allied, so when Germany invaded Belgium, Great Britain was obligated to side with Belgium and declare war.