Who declared World War II?
Explanation from a Help Zone Pro
This Explanation is reliable because it was submitted by someone Alloprof has identified as trustworthy.
Hello there, PurpleMacaw2327!
I have the answer to your question. :)
World War II started when Germany invaded Poland on September 1st, 1939. Great Britain and France later responded to that with the declaration of war towards Germany on September 3th.
Hope this helped. :}
Explanation from Alloprof
This Explanation was submitted by a member of the Alloprof team.
Great Britain and France officially declared war on Germany. However, this declaration of war was triggered by the German invasion of Poland.
I invite you to take a look at our concept sheet on the Second World War to learn more on the subject. For now, it is only available in French, but a translated version is coming up soon :)
Do not hesitate to write to us again if you have any other questions! :)