Other websites
- The Normandy Invasion Archived 2010-11-08 at the Wayback Machine at the US Army Center of Military History
- Neptune Operations Plan Archived 2014-05-03 at the Wayback Machine
- Naval details for Overlord at Naval-History.Net
- Quiz questions
- Documents on D-Day: The Invasion of Normandy Archived 2017-12-01 at the Wayback Machine at the Eisenhower Presidential Center