World war II?

Question:I am trying to build a family tree and need to do some research on my grandad, does anyone know what month war was declared in 1939?
Thanks

Best Answer - Chosen by Asker: I am trying to build a family tree and need to do some research on my grandad, does anyone know what month war was declared in 1939?
Thanks

September 3rd 1939 ( remembered because it was the day after my own birthday ) but I didn't cause it honestly.

Of course it was September the 5th I think. I was playing in my aunts garden

September unless you are from the US then it was December

In Europe -- September 1, 1939

In United States -- December 7, 1941

If you now your grandad`s name,rank and regiment,you can trace his where abouts during the war.Start point would be the Imperial War Museum for information on how to start.

Sept 1 1939 at 11 am on the radio that how most of Britain found out

On September 1, 1939, Germany invaded Poland, using the false pretext of a faked "Polish attack" on a German border post. On September 3, the United Kingdom issued an ultimatum to Germany. No reply was received, and Britain, Australia and New Zealand declared war on Germany, followed later that day by France. Soon afterwards, South Africa, Canada and Nepal also declared war on Germany.
On September 17, the Soviet Union, pursuant to its prior agreement with Germany, invaded Poland from the east. Poland was soon overwhelmed, and the last Polish units surrendered on October 6.
On December 7 1941, a Japanese carrier fleet launched a surprise air attack on Pearl Harbor. The raid destroyed most of the American aircraft on the island and knocked the main American battle fleet out of action (three battleships were sunk, and five more were heavily damaged, though only USS Arizona and USS Oklahoma were permanently lost, the other six battleships were repaired and eventually returned to service). Nevertheless, the four American aircraft carriers were at sea and escaped destruction. At Pearl Harbor, the main dock, supply, and repair facilities were quickly repaired. Furthermore, the base's fuel storage facilities, whose destruction could have crippled the Pacific fleet, were untouched. The attack united American public opinion to demand vengeance against Japan. The following day, December 8, the United States declared war on Japan as did the United Kingdom.

in the UK - September 3rd - I only know this as my son was born on this day a couple of years back and one of my ancient uncles keeps telling me.

Another thing to do is google your question - enough info on the web about WWII.

The British declaration of war against Nazi Germany came at 11.15 on September 3rd 1939. Neville Chamberlain spoke to the nation via radio. Britain had given Hitler an ultimatum to withdraw from Poland after the Germans invaded Poland on September 1st.

Here is the complete declaration
http://www.historylearningsite.co.uk/bri...

The US came in late again just like WW1