https://www.warhistoryonline.com/world-war-ii/frederic-walker.html
Frederic Walker: The Most Successful Anti-Submarine Commander During the Battle of the Atlantic |...
Feb 17, 2023 - Capt. Frederic John Walker became one of the foremost anti-submarine commanders of World War II for his role in the Battle of the Atlantic.
frederic walkerthe mostanti submarine