Video
If not Pearl Harbour?
Study If not Pearl Harbour?, a Dr. Alex Clarke video from 7 Dec 2023, with 52 time notes. Topics include Alternate History, British Empire, Imperial Japanese Navy.
Time notes
- 6:19The planning paradox behind Pearl HarborChapter
Why attacking the Pacific Fleet's principal base conflicted with Japan's need to lure American forces into an unfavorable advance.
- 9:19QuestionWhy is the Panama Canal not one of the alternative carrier-strike targets?AnswerQ&A
It was too distant for the carrier exercise, though Japan might instead have attacked the locks with commandos aboard a disguised merchant ship.
- 15:09Singapore's base investment lacked a dedicated defense commandNotable Point
Building a major naval base without matching defenses and a permanent planning staff left Singapore strategically exposed.
- 16:52The northern approach and missing American carriersNotable Point
The Japanese northern route reduced detection risk, while Enterprise and Lexington narrowly avoided the strike area.
- 18:09QuestionHow much of a threat did Japan consider the American carriers?AnswerQ&A
Not much; Japanese planners treated them mainly as defensive assets rather than the leading American naval threat.
- 20:20Japanese doctrine was a planning system, not one battle sloganNotable Point
The decisive-battle idea sat within annual operations plans and imperial-defense policy, while Pearl Harbor drew on different ambush and attrition concepts.
- 22:07Attrition before the decisive battleChapter
Japanese doctrine expected an advancing enemy to be worn down before a decisive battle close to the home islands.
- 25:25QuestionDidn't attacking Pearl Harbor force the US fleet to remain in port and undermine Japan's plan to wear it down during an advance?AnswerQ&A
Yes. The strike created the anger Japan wanted but removed the intact battle fleet that could have made the rash advance its attrition doctrine required.
- 27:08Nagumo's two waves sat between incompatible strategiesNotable Point
Stopping after two waves had already done too much damage for a lure, yet not enough for an attempt to cripple the Pacific Fleet completely.
- 29:59A timely declaration would trade surprise for a stronger lureNotable Point
Warning the United States before the strike would weaken an ambush but might leave more confident survivors able to sail west.
- 31:25QuestionWhat about striking Pearl Harbor's fuel dumps and oil-storage facilities?AnswerQ&A
Those were targets for the unlaunched third wave, whose extra damage would have deepened the raid's conflict with Japan's supposed attrition strategy.
- 32:02Criteria for an alternative opening strikeChapter
An alternative target had to be reachable, politically provocative, and capable of drawing enemy forces toward Japanese ambushes.
- 35:28QuestionWhat might happen if Somerville's Royal Navy carrier force fought Kido Butai in the Indian Ocean?AnswerQ&A
British night-strike and radar advantages could inflict severe carrier losses, though the exact supporting capital-ship positions require more detailed reconstruction.
- 38:28San Francisco as a political targetChapter
A strike on San Francisco could create greater political outrage than an attack on San Diego's stronger military targets.
- 45:05QuestionCould Japanese naval aircraft have damaged the dams around San Francisco?AnswerQ&A
They could attempt it, but available weapons were poorly suited to destroying the dams; specialized underwater blast effects were needed.
- 45:32Anchorage as a low-risk provocationChapter
Anchorage offered an easy strike on American territory, but its remoteness and limited military value weakened the political effect.
- 48:24QuestionWere bouncing bombs developed mainly to get past torpedo nets?AnswerQ&A
The main problem was placing an explosive deep against the dam wall so the underwater blast could destroy it.
- 50:23QuestionCould Japan afford an Alaska or San Francisco strike before taking the Dutch East Indies' oil?AnswerQ&A
Possibly: Anchorage was closer than Pearl Harbor, and San Francisco might require only a two-carrier detachment because it offered fewer targets.
- 53:09QuestionIf Pearl Harbor were not attacked, would Husband Kimmel stay in command and change the war?AnswerQ&A
Probably; Kimmel was aggressive and capable, and might have commanded the fleet at sea, though he was not necessarily reckless.
- 55:29The Philippines as the operational lureChapter
Attacking the Philippines could draw intact American ships into the western Pacific, where losses at sea would be permanent.
- 57:01QuestionWould a Japanese landing force in Alaska face enough well-armed irregulars to stop it?AnswerQ&A
Probably not; 1941 Alaska had a much smaller and more scattered population than the modern territory, leaving local resistance badly overmatched.
- 58:55How losing the Pacific Fleet could reshape 1942-44Chapter
Destroying an American relief fleet at sea could delay major Pacific offensives for years and pull Britain into a defensive holding strategy.
- 1:02:16Mutual misunderstanding made diplomacy more dangerousNotable Point
American and Japanese contacts repeatedly talked past cultural and strategic assumptions instead of reducing the risk of war.
- 1:09:56Why attrition needs an emotional opponentNotable Point
A rational commander pauses when losses become unfavorable; a politically driven fleet may continue into the ambush.
- 1:11:07QuestionCould Japan split its six carriers between San Francisco, Anchorage, and the Philippines?AnswerQ&A
It could divide them two-two-two, but sustaining and coordinating three distant attacks would impose a major logistics burden.
- 1:11:32QuestionCould Japan use a submarine-borne commando raid instead of sending carriers to the American coast?AnswerQ&A
It could attempt one, but a covert raid lacked the political scale needed to provoke the full American fleet and imposed difficult infiltration requirements.
- 1:12:16Samurai and bushi are not exact synonymsNotable Point
A short language lesson shows how translating both social status and military function as warrior can flatten Japanese history.
- 1:16:07QuestionDid Japan negotiate with the United States in bad faith while its carrier fleet sailed for Pearl Harbor?AnswerQ&A
The contacts were an unresolved diplomatic argument over Japan's actions in China, not negotiations for a peace treaty ending an existing war.
- 1:17:39Singapore and the problem of American neutralityChapter
A strike on Britain could leave Washington debating entry while Japan seized resource areas and isolated the Philippines.
- 1:19:09American isolationism was selective in the Far EastNotable Point
Washington resisted European commitments while intervening politically in Asia, weakening the alliances needed to support its Far Eastern policy.
- 1:27:35Sydney and the strain on British global powerChapter
Attacking Australia could force Britain to divert forces across the empire without automatically bringing the United States into the war.
- 1:29:10QuestionWould the Royal Navy strip submarines from western theaters to reinforce India and Australia?AnswerQ&A
It would probably send more, especially from the Atlantic, though Britain already operated a significant submarine force from Australia.
- 1:32:08QuestionCould a Japanese attack on Australia knock Britain or Australia out of the war?AnswerQ&A
Probably not; it would more likely enrage Australia and impose severe additional strain on Britain's worldwide commitments.
- 1:32:39A Pacific crisis exposes Britain's capital-ship production pauseNotable Point
An attack on Australia would magnify the cost of pausing capital ships when escort production was already established on continuing lines.
- 1:33:39QuestionWould a Japanese threat to the empire increase South African participation or the mobilization of African troops?AnswerQ&A
Potentially; South African politics would complicate the response, but Britain would probably rely more visibly on troops recruited across Africa.
- 1:36:18Indian pilots were overlooked, not unknownNotable Point
Repeatedly calling Indian airmen unknown can obscure both their wartime contribution and the scholarship that has already recovered it.
- 1:37:17Declare war, then waitChapter
Japan might declare war without striking, forcing the United States to justify the first offensive move and expose its fleet.
- 1:43:08QuestionIn the scenario built around an attack on Sydney, would Japan still take Papua New Guinea?AnswerQ&A
Yes. Japan would seize Papua New Guinea, wait for an American advance, and counterattack the approaching force.
- 1:43:47QuestionHow much did Germany's early success shape Japan's decision to attack the European empires?AnswerQ&A
Germany's success mattered within a loose alignment, but Japan, Germany, and Italy shared grievances more than coordinated strategy.
- 1:48:32Reinforcement convoys as ambush targetsChapter
Convoys bound for exposed Pacific bases could let Japan attrit American forces without first seizing the bases themselves.
- 1:51:57QuestionHow could Japan wait when it urgently needed oil from the Dutch East Indies?AnswerQ&A
The resource pressure remained, but Japan could explore purchases from the Soviet Union and other sources before invading.
- 1:52:50QuestionWould American reluctance to use convoys prevent Japan from ambushing reinforcement formations?AnswerQ&A
No; troop and military-supply movements would still need escorts, and predictable tracks without strong zigzag habits could make them vulnerable to Japanese night torpedo attacks.
- 1:54:46Neutral bases could restrict American submarinesNotable Point
If Britain, the Netherlands, and Australia stayed outside the war, American submarines would lose the forward access needed to reach much of Japan's resource network.
- 1:57:01QuestionHow long would Japan wait before attacking the Dutch East Indies?AnswerQ&A
Probably a few months, after attriting substantial American strength in the reinforcement convoys.
- 1:57:39QuestionCould Japan create the missing political shock by torpedoing a US-flagged liner evacuating civilians from the Far East?AnswerQ&A
Possibly, but such a US-flagged evacuation might not exist: civilians in Japanese territory would be interned, while others might leave aboard paid neutral British ships.
- 1:59:01QuestionWould Britain join the United States against Japan in exchange for American entry into Britain's war?AnswerQ&A
Potentially, but Churchill would hold considerable bargaining power and would likely demand a significant deal.
- 1:59:24Pearl Harbor's tactical success and strategic failureChapter
The attack produced spectacular immediate damage but forced the United States to adopt a slower, more effective method of war.
- 2:03:46QuestionIf the American fleet were destroyed at sea, would the United States remain a battleship navy or prioritize carriers?AnswerQ&A
It would depend on how the defeat occurred: a carrier-led victory would validate aviation, while a Japanese battle-line finish could accelerate Iowa and Montana construction.
- 2:12:01QuestionWould a Japanese defeat of the American battle fleet cause Britain to accelerate Vanguard and the Lion class?AnswerQ&A
Probably; Vanguard and the Lion-class projects would gain urgency once a modern capital-ship threat made their strategic value immediate.
- 2:12:50QuestionDid Admiral Kimmel simply fail to trust trained radar operators before Pearl Harbor?AnswerQ&A
No; the operators were no longer on duty, and Kimmel was also denied intelligence briefings that his predecessor had received.
- 2:14:03When historical films put story before historyNotable Point
Works built around the surviving history differ from films that borrow real names for a director's preferred fictional story.
- 2:18:02QuestionWould losing the standard battleships to Yamato and Musashi make the United States arm the Montanas with an 18-inch gun?AnswerQ&A
Perhaps not the Montanas, but the defeat could drive a new American battleship class toward an 18-inch/50 or larger gun.