Key Facts
- Ships sunk
- 609 merchant and Allied vessels
- Tonnage lost
- 3.1 million tons
- U-boats lost
- 22
- Duration
- January–August 1942 (~8 months)
- Share of total WWII U-boat sinkings
- ~25% of all ships sunk by U-boats in WWII
Strategic Narrative Overview
From January to approximately August 1942, German submarines conducted several coordinated operations, including Operation Paukenschlag and Operation Neuland, targeting merchant vessels and Allied naval ships along the North American coast and Caribbean. The absence of an effective convoy system and adequate escort vessels left ships highly vulnerable. U-boats operated with little risk, earning the period the informal name 'American Shooting Season' among German submariners.
01 / The Origins
Following Adolf Hitler and Benito Mussolini's declarations of war on the United States on 11 December 1941, Axis submarines were cleared to operate against shipping along the American eastern seaboard. U.S. coastal defenses were weak and disorganized, and Admiral Ernest J. King, commander-in-chief of the USN, was slow to implement countermeasures or accept British convoy expertise, creating ideal conditions for German U-boat operations.
03 / The Outcome
The phase wound down around August 1942 as the United States belatedly instituted a coastal convoy system. The shortage of suitable escort vessels, compounded by King's initial refusal of British assistance, had prolonged the crisis. The campaign cost thousands of lives, mostly merchant mariners, and sank roughly one quarter of all ships destroyed by U-boats during the entire Second World War.
Belligerents & Mobilization Analysis
Side A
2 belligerents
Side B
2 belligerents
Ernest J. King.
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.