MAPS OF HISTORY · WWI · ALL CHAPTERS · The convoy system
Turning point · The Great War, 1914–1918
The convoy system
May 1917 — After April’s catastrophe — 860,000 tons sunk in one month — the Admiralty finally groups merchantmen under escort. Losses collapse; the U-boat arithmetic that was supposed to beat America to the field is destroyed within six months.
This is one scene of Chapter 6 — The Slowest Weapon in The Great War, 1914–1918.
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