Two Commanders, One Fog (Convoy ONS 5, 1943)

A fuel gauge forced one commander out of his own climactic battle. A fog bank hid a radar advantage the other side couldn't even detect. This is Convoy ONS 5, May 1943 — told as two mirrored commanders' decisions under uncertainty, not a scoreboard. In the first week of May 1943, more than forty U-boats converged on one North Atlantic convoy — the largest wolfpack concentration thrown against a single convoy in the entire war. Nine days later, that wolfpack had lost more boats than any had ever lost attacking one convoy. This video follows both sides of that reversal: Commander Peter Gretton, forced to hand his escort group to a subordinate mid-battle when his destroyer ran low on fuel; Lieutenant Commander Robert Sherwood, who fought the climactic fog-bound action with a command he'd just inherited; and Grand Admiral Karl Dönitz, reading fragmentary radio reports in Berlin as he decided when an entire ocean campaign stopped being worth running. Every disputed figure here is presented as a range, not a flat number — the 42-vs-43-ship convoy size, the "six confirmed, a seventh probable" U-boat kills, the low-to-mid-40s total U-boat losses for the month. Two separate Dönitz quotes, from two different kinds of sources (his wartime war diary and his postwar memoir), are kept on screen with separate attributions rather than merged into one line. Full source list in the pinned comment. Chapters: 00:00 Cold Open 01:41 Part One – The Month Before the Month 07:04 Part Two – Convoy ONS 5 Sails 10:03 Part Three – The Wolfpack Gathers 12:37 Part Four – The Fuel Gauge 14:32 Part Five – Fog 20:15 Part Six – The Commander Who Wasn't There 25:40 Close If a story about two decisions made in the dark, on opposite sides of the same battle, is worth half an hour of your evening, subscribe — there's a lot more of this war's quieter turning points still to cover. Sources: U.S. Naval History and Heritage Command (H-Gram 019-4, "Black May"), uboat.net's Convoy ONS-5 and U-boat fates databases, historyofwar.org, Stephen Roskill's "The War at Sea 1939-1945, Vol. II," Michael Gannon's "Black May," Karl Dönitz's "Memoirs: Ten Years and Twenty Days," and the Dönitz war-diary quote as cited via John Terraine and Robert Goralski. Full citations in research notes. #history #WWII #BattleOfTheAtlantic #ConvoyONS5 #militaryhistory