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In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.

The Battle of Dunkirk was a military operation that took place in Dunkirk (Dunkerque), France, during the Second World War. The battle was fought between the Allies and Nazi Germany. As part of the Battle of France on the Western Front, the Battle of Dunkirk was the defence and evacuation of British and Allied forces in Europe from 26 May to 4 June 1940. Question: "The Darkest Hour" generally refers to the time when Britain was under threat of invasion in 1940 and 1941. Who coined the phrase? Answer: Winston Churchill
Output:
As part of the Battle of France on the Western Front, the Battle of Dunkirk was the defence and evacuation of British and Allied forces in Europe from 26 May to 4 June 1940.