Dunkirk was a port city in northern France.
During World War II, it was the site of the Battle of Dunkirk.
338,000 British Army soldiers were evacuated on boats from the area (TV: Co-Owner of a Lonely Heart [+]Patrick Ness, Class television stories series 1 (BBC Three, 2016).) as part of Operation Dynamo. (AUDIO: The Nemonite Invasion [+]David Roden, New Series Adventures Audio (BBC Audio, 2009).)
The First Doctor was present at Dunkirk, (PROSE: Just War [+]Lance Parkin, Virgin New Adventures (Virgin Books, 1996)., PROSE: Byzantium! [+]Keith Topping, BBC Past Doctor Adventures (BBC Books, 2001).) as was the Eighth Doctor. (AUDIO: Fugitives [+]Nicholas Briggs, Dark Eyes (The Eighth Doctor Adventures: Dark Eyes, Big Finish Productions, 2012).)
When aiding the Sontarans in their battle against an undying force, the Fourth Doctor asked Field Major Lenk "where's your Dunkirk spirit?" (AUDIO: The Eternal Battle [+]Error: Code 2 - no data stored in variables, cache or SMW.)
The Tenth Doctor and Donna Noble prevented a Nemonite from taking possession of those involved in the Dunkirk evacuation. (AUDIO: The Nemonite Invasion [+]David Roden, New Series Adventures Audio (BBC Audio, 2009).)