1917 politics
U-boats and US entry.
Atlantic 1917 and 1939-43, Pacific 1941-45, Cuban Crisis close calls -- dated.
No "how they hunted" geometry.
Principles
Pacific tonnage
A logistic decision.
SSBN
Hidden deterrent.
SSBN
Nuclear ballistic-missile submarine -- deterrent holder. Read as a 1900s-present (as a war type; ancestors earlier) concept in Atlantic 1914-45, Pacific 1941-45, then a nuclear-deterrent undersea.
Nautilus
First nuclear-powered submarine, 1954. Not a present instruction.
Steps
- Holland boats
1900s: Practical military types spread.
A dated type-history beat of Submarine (1900s-present (as a war type; ancestors earlier)). No employment, arming, or build steps.
- Lusitania
1915-05: A political shock of U-boat war.
A dated type-history beat of Submarine (1900s-present (as a war type; ancestors earlier)). No employment, arming, or build steps.
- Unrestricted & US entry
1917: A legal-political hinge.
A dated type-history beat of Submarine (1900s-present (as a war type; ancestors earlier)). No employment, arming, or build steps.
- Atlantic crisis and turn
1939-43: Donitz vs convoy/air/intel.
A dated type-history beat of Submarine (1900s-present (as a war type; ancestors earlier)). No employment, arming, or build steps.
- US Pacific boats
1941-45: Tonnage against Japan.
A dated type-history beat of Submarine (1900s-present (as a war type; ancestors earlier)). No employment, arming, or build steps.
- Nautilus
1954: Nuclear propulsion.
A dated type-history beat of Submarine (1900s-present (as a war type; ancestors earlier)). No employment, arming, or build steps.
Diagrams
From Holland boats (1900s) through Nautilus (1954) to Kursk sinks (2000-08-12) in Atlantic 1914-45, Pacific 1941-45, then a nuclear-deterrent undersea. One sequence, not a staff overlay.
John Philip Holland (Designer) and Reinhard Scheer / early U-boat command (German navy) sit at the centre of most English accounts; Vasili Arkhipov and ROK KSS programme leads correct the usual photograph.
Limits
Source limits
Figures such as "not a war -- merchant and navy dead sit on U-boat and Pacific war ledgers" stay in ranges because records are incomplete, political, or still closed. What was unrestricted submarine warfare? is answered as a band.
No how-to
Submarine is systems history and employment as a past fact. This page does not teach manufacturing, arming, aiming, or attack procedures.
Memory bias
English-language fame of Submarine and local memory in Atlantic 1914-45, Pacific 1941-45, then a nuclear-deterrent undersea are not the same map. ROK KSS programme leads is often the correction the first photograph drops.
Wolfpack is a historical label. It is not a lesson plan.
Mines and air patrols were part of the same seas.