A thread follows one event or historical theme across the archive, wherever and whenever it appears. Pulling a thread opens up a narrowed timeline view filtered to every year that thread touches.
The surrounding and subsequent evacuation of the British Expeditionary Force and allied forces from the town of Dunkirk in Northern France in 1940. The evacuation cemented itself in the popular imagination with the mass deployment of British civilian craft to help rescue trapped soldiers as the German forces surrounding them closed their encirclement.