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the claim

Britain declared war on Germany in September 1939.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
8 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that Britain declared war on Germany in September 1939?

Yes. Multiple reference and peer-reviewed sources state that Britain (the United Kingdom) declared war on Germany on 3 September 1939, following the German invasion of Poland.

Verdict: SUPPORTED · 8 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 8
September 1939
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September 1939. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/September_1939

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More for · 7
British declaration of war on Germany (1939) - Wikipedia
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British declaration of war on Germany (1939) - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/British_declaration_of_war_on_Germany_(1939)

Britain and France declare war on Germany | September 3, 1939 | HISTORY
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Britain and France declare war on Germany | September 3, 1939 | HISTORY. (n.d.). history.com. https://www.history.com/this-day-in-history/september-3/britain-and-france-declare-war-on-germany

Normandy veterans association, branch 60 highlands & islands, annual pilgrimage to europe 2002 to ... 2009
2015
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Bert, S. (2015). Normandy veterans association, branch 60 highlands & islands, annual pilgrimage to europe 2002 to... 2009. archive.org. https://archive.org/details/normandyveterans0000scor

Winston Churchill
2003
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1958-, M. F. (2003). Winston Churchill. archive.org. https://archive.org/details/winstonchurchill0000macd

An interlude: the Second World War, 1939-1945
1990
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An interlude: the Second World War, 1939-1945. (1990). doi.org. https://doi.org/10.1093/oso/9780198539186.003.0006

The Second World War: 1939—1945
1991
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The Second World War: 1939—1945. (1991). doi.org. https://doi.org/10.1007/978-1-349-12232-5_10

The Polish-Soviet War of 1939
1991
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The Polish-Soviet War of 1939. (1991). doi.org. https://doi.org/10.1007/978-1-349-21379-5_2

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