# Battle of the Atlantic

Information protects supplies · North Atlantic sea routes.

Place · Fictionalized · Established

Stable ID: `margin-aces-location-4` · Revision 2 · Updated 2026-10-30

Context: [Margin Aces](/field-guide/collections/margin-aces/)

[Web page](/field-guide/entities/margin-aces-location-4/) · [JSON record](/field-guide/entities/margin-aces-location-4/record.json)

## At a glance

- Ace of Spades closes the Channel chapter. The Margin Ace begins with a readable fan, then spreads the ink wider. The convoy context connects the page’s open route to a larger idea: avoiding danger can preserve something valuable.

- Real campaign context · fictional sortie and illustrative map, not a geographic reconstruction.

## Appearances

- [Margin Aces encyclopedia](/gamelab/projects/marginaces/) (context: [Margin Aces](/field-guide/collections/margin-aces/))

## Dated changes

- 2026-10-30: Added from the named source to the Field Guide.

## Open questions

- Could codebreakers read every naval message throughout the war? No. Enigma procedures and equipment changed. Interruptions in Allied reading meant that intelligence advantages could disappear and had to be rebuilt.

## Sources

- [Margin Aces encyclopedia](/gamelab/projects/marginaces/)

## Reference library

### Source reference

![Battle of the Atlantic: the shared regional illustration assigned to this entry in the Margin Aces encyclopedia.](/field-guide/assets/references/margin-aces-location-4/01-notebook-landscape-v1-1200.webp)

Battle of the Atlantic: the shared regional illustration assigned to this entry in the Margin Aces encyclopedia.

[Download full-size image](/field-guide/assets/references/margin-aces-location-4/01-notebook-landscape-v1.webp) · [Original project image](/gamelab/marginaces.html) · v1 · SHA-256: `eb0ee753736a52f0735ab0d1d9387ef3748470a9f43493f4b3eb264ad4c53bf3`

### Scene

![Battle of the Atlantic: the assigned Margin Aces campaign stage at 2 seconds.](/field-guide/assets/references/margin-aces-location-4/02-stage-2-v1-1200.webp)

Battle of the Atlantic: the assigned Margin Aces campaign stage at 2 seconds.

[Download full-size image](/field-guide/assets/references/margin-aces-location-4/02-stage-2-v1.webp) · [Actual game scene](/gamelab/marginaces.html) · v1 · SHA-256: `e4b0d5c0fc7510a69d165f0aaae2b3c1061fff9112c1bee8b01b01001565feb7`

### Scene

![Battle of the Atlantic: the assigned Margin Aces campaign stage at 12 seconds.](/field-guide/assets/references/margin-aces-location-4/03-stage-12-v1-1200.webp)

Battle of the Atlantic: the assigned Margin Aces campaign stage at 12 seconds.

[Download full-size image](/field-guide/assets/references/margin-aces-location-4/03-stage-12-v1.webp) · [Actual game scene](/gamelab/marginaces.html) · v1 · SHA-256: `b77eee6a1e75573b7baf2d79b5eb980a998c0decee66ac98b0c60fe7bc17c577`