1939–1945 · The Complete Record

The Battle
at Sea

The Battle of the Atlantic was fought by tens of thousands of vessels across six years of ocean. This is the campaign in data: every Allied warship, every U-boat, every recorded fate — drawn from the records of uboat.net and told ship by ship.

The Campaign in Numbers · Computed from the Records

21,195

Allied warships on record

1,153

German U-boats on record

649

U-boats destroyed at sea

826,898

Wartime event records

218

Wolfpack patrol groups

742

Final positions plotted

Database 01

Allied Warships

Search the full Allied order of battle — 21,195 warships from 18 navies, from fleet carriers to armed trawlers. 5,831 of them carry day-by-day wartime service histories.

Search the fleet →

Database 02

The U-Boats

Every one of the 1,153 U-boats in the dataset — builders, commanders, patrols, successes and final fates, from commissioning to the last recorded position.

Search the boats →

Interactive Map

The U-Boat War, Charted

Replay the war month by month on an interactive chart of 742 recorded final positions. Track a single boat, light up a wolfpack, or follow the guided story of the campaign from 1939 to 1945.

Open the chart →

New to the history? Start with What Was the Battle of the Atlantic? — then come back and meet the ships that fought it.

Vessel records, service histories and fates compiled from uboat.net · Final positions parsed from recorded fates

The Battle at Sea · Battle of the Atlantic Story