On what date did Britain declare war on Germany at the start of the Second World War?

Answer and explanation

Correct answer: A. 3 September 1939

  1. Step 1: On 3 September, based on their alliance agreements with Poland, the United Kingdom and France declared war on Germany; in the end their aid to Poland was very limited. Answer: 3 September 1939. Why not the others: None of these fit: 1 August 1914; 8 May 1945; 6 June 1944.

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