Putting dense Bristol radial engines into the 1910s first transforms fast coastal craft, then pulls airframes, torpedo bombers, and carrier conversion forward.
Without viable STOVL fighters, the Invincibles become helicopter carriers and the Falklands campaign drives an emergency return to full-sized carrier aviation.
Replacing the historical quad-and-twin arrangement with two triples and two twins adds another turret type without solving the class's basic weight problem.
Post-Cold War savings and repeated claims that missiles made crewed aircraft obsolete reduced carrier fleets, but combat experience kept disproving the simplest version of that argument.
Without Lexington's fuel-vapor explosions, US carriers would learn survivability lessons later and remain more vulnerable during the early Pacific War.
The Southampton, Gloucester, and Edinburgh groups represent successful iteration, with later refinements not turning the earlier ships into bad designs.
American yard capacity might support Hornet plus five more Yorktowns, creating an early multi-carrier force but also provoking foreign construction and escort demands.
A longer Pacific war could bring more powerful Hellcat and Helldiver variants aboard carriers, but the Bearcat and Corsair already competed for attention and production.
A higher treaty ceiling invites an enlarged Tribal with eight guns and heavy torpedo armament, crossing the practical boundary between destroyer leader and cruiser.
Closing Britannic's lower-deck portholes could have slowed progressive flooding enough to ground the hospital ship, though salvage and repair would remain uncertain.
Dutch and Polish interest in submarine-launched Tomahawk reflects the missile's reliability, large support base, and accumulated operational experience.
Vertical and short takeoff fighters impose difficult engineering costs while dispersed bases and short conventional runs can solve many of the same operational problems.
Both actions used destroyers against superior forces, but Barents Sea relied heavily on convincing dummy attacks while Johnston pressed home real attacks.
Natori's condition may have complicated scuttling, but unfamiliarity with a captured ship's valves and internal design could also defeat the first plans.
Rare very-close encounters could defeat gun depression or let shells pass through light hulls before exploding, prompting improvised anti-submarine weapons.
A durable union could divide service responsibilities, reshape decolonization, and grow into a world federation, but language, leadership, and imperial policy threaten the marriage.
Rigging was complex enough to demand dedicated petty-officer expertise, separate plans, and careful comparison across different generations of warship.
Modern fire control does not cure Blucher's limited gun elevation, leaving Harwood's cruisers able to damage and eventually torpedo her from advantageous ranges.
Long patrol distances, Arctic operations, and the absence of a ready Western ocean-going diesel design make an SSN fleet strategically compelling despite its cost.
Legal ambiguity leaves theoretical room for privateering, but modern complexity and weak government control make it an emergency substitute for an inadequate fleet.
A mass-produced ZSU-23-4 equivalent would devastate low-level attackers but accelerate the move toward higher-altitude bombing, rockets, and stand-off weapons.
A sentient Imperial German fleet destroying the Kriegsmarine is fantasy, but the scenario illustrates Norway's importance, Swedish ore, Atlantic access, and British capital-ship policy.
Keeping a Seydlitz-scale capital ship would give Germany a much more dangerous replacement entitlement and push Britain to bring more powers into treaty limits.
Adding Incomparable, Conqueror, Thunderer, and St Vincent in 1937 would double Britain's fast capital-ship strength, alarm every rival, and redirect the King George V and Lion programs.
Britain could plausibly have traded 16-inch guns for speed, presenting the choice as both an imperial requirement and a gesture of confidence in naval arms limitation.