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Anti-aircraft gunner John Hamilton was part of the British Army told to evacuate from Dunkirk in May 1940.
For three days his battery defended retreating troops from aerial attacks by German Stuka bombers.
Eventually the order was given to destroy their guns and join the evacuation.
We Were There aims to collect as many first-hand accounts as possible by 2025, the 80th anniversary of the end of the war, to preserve veterans accounts for future generations.