U-boat Archive preserves documents and photographs from the World War II submarine war and was still adding German patrol records in 2026. It is the kind of specialist historical site that becomes more useful every year it refuses to disappear.
V2Rocket.com is a deep technical and historical archive of the German A-4/V-2 program, covering design, deployment, surviving hardware, launch records, Peenemünde, forced labor at Mittelwerk, and the weapon's postwar legacy.
SSRichardMontgomery.com is a long-running private research site about the Liberty ship wreck in the Thames Estuary, combining government reports, photographs, ship records, maps, news clippings, and the author's strongly argued risk assessments.
CanadianSoldiers.com organizes official histories, bibliographies, unit information, campaign research, and military references into a specialist web library focused on Canada's 20th-century army.
USSHelena.org grew from a veterans organization into a sprawling web archive covering four ships named Helena, reunions, crew collections, Pearl Harbor material, war diaries, photographs, memorials, and the memories of the people who served aboard them.
Anders Baadsgaard Straarup built AirmenDK into a bilingual research archive of Allied aircraft and airmen lost over Denmark and Danish waters from 1939 to 1945.
The 90th Infantry Division Preservation Group built a deep research archive of unit histories, regulations, manuals, equipment and scanned primary documents around the WWII 'T-O' Division.