Human-cost band
not a war -- merchant and navy dead sit on U-boat and Pacific war ledgers
Merchant sailors are the large civilian-adjacent ledger of both U-boat wars. Navy submariners' death rates in 1939-45 German service were extremely high -- a historical fact of that force.
Deterrent boats' cost is fiscal and political: a state's insurance premium.
Bands
Dated span (1900s-present (as a war type; ancestors earlier))
Submarine is taught as 1900s-present (as a war type; ancestors earlier). 1900s and 2000-08-12 are the usual poles.
Theatre (Atlantic 1914-45, Pacific 1941-45, then.)
Atlantic 1914-45, Pacific 1941-45, then a nuclear-deterrent undersea is the geography of the ledger -- cities, seas, plants, or ministries as the file requires.
Unrestricted & US entry
1917: A legal-political hinge.
Cold War close calls
1962-91: Public collisions and crises -- named as history.
Regions
Atlantic 1914-45
Core theatre of Submarine (1900s-present (as a war type; ancestors earlier)). A political shock of U-boat war.
First U-boat war
1900-18: Law and food.
Second U-boat / Pacific
1939-45: Tonnage wars.
More operators
After 1991: ROK KSS; accidents as memory.
US / UK / AU / CA classrooms
US/UK/AU/CA museums and air/navy shows carry Submarine as a type icon; school hours stay thinner than film.
Korean comparative reader
Submarine is read beside Yulgok, Hanwha, and ROK procurement history: a type or firm in a conscript-alliance state, not a live ORBAT.
Key numbers
Span1900s-present (as a war type; ancestors.
Cost bandnot a war -- merchant and navy dead sit.
TheatreAtlantic 1914-45, Pacific 1941-45, then.
Hero articleSubmarine
Makers
John Philip Holland
John Philip Holland (Designer) is a named maker of the Submarine story. An early practical-submarine name in English and US histories.
Reinhard Scheer / early U-boat command
Reinhard Scheer / early U-boat command (German navy) is a named maker of the Submarine story. High Seas Fleet context; U-boat war as a parallel campaign -- see also Holtzendorff's 1917 memo fame.
Karl Donitz
Karl Donitz (U-boat / later head of state) is a named maker of the Submarine story. The 1939-45 U-boat commander and brief 1945 successor -- a Nuremberg name. Use as history, not as a teacher of packs.
Dudley Pound / Atlantic
Dudley Pound / Atlantic (RN) is a named maker of the Submarine story. The convoy-war institutional British side -- Western Approaches as a system.
Charles A. Lockwood
Charles A. Lockwood (US Pacific boats) is a named maker of the Submarine story. The named US submarine force commander of the Pacific tonnage war.
Hyman Rickover
Hyman Rickover (Nuclear navy) is a named maker of the Submarine story. Again the institutional engineer -- Nautilus as a propulsion politics.
Kursk 2000 is a peacetime cost the public remembers.
Japan 1945 hunger is on the WW2 page and belongs in the tonnage paragraph.