03/09/2026
On this day in Naval History - 3 September 1939
Just hours after war was declared, the Battle of the Atlantic officially began.
It would become the longest, largest, and most complex continuous naval campaign in history. Following the tragic sinking of the passenger liner SS Athenia by a German U-boat on 3 September, the Royal Navy was immediately thrust into a relentless, six-year struggle.
Alongside our Allied partners and the brave crews of the Merchant Navy, the Royal Navy fought day and night through brutal conditions to secure the vital shipping lanes that kept Britain supplied and alive.
Today, we remember the courage, resilience, and ultimate sacrifice of all those who served above and beneath the waves.