.
.
The Royal Navy White Ensign raised over a captured German U-boat U-190

"The Battle of the Atlantic was the dominating factor all through the war. Never for one moment could we forget that everything happening elsewhere, on land, at sea or in the air depended ultimately on its outcome."

— Winston Churchill

 

The Battle of the Atlantic was the longest continuous military campaign in World War II, from 1939 to the defeat of Germany in 1945.

The White Ensign raised over a captured German U-boat U-190 in 1945