Video
Patreon 12: “The Battle of Sluys: ...one of the Western World decisive battles"
Study Patreon 12: “The Battle of Sluys: ...one of the Western World decisive battles", a Dr. Alex Clarke video from 1 Dec 2020, with 50 time notes. Topics include Battle Of Sluys, English Navy, French Navy.
Time notes
- 2:02Science fiction exposes a fleet-design blind spotNotable Point
A fictional missile-heavy fleet becomes more plausible when compared with real navies that concentrate on large weapons while leaving close-in protection relatively weak.
- 8:23Sluys opens the Hundred Years War at seaChapter
The Battle of Sluys is introduced as the first major clash of the Hundred Years War and an unusually lethal medieval naval action.
- 10:03Aquitaine and Scotland turn a dynastic dispute into warChapter
Edward III's French lands and Philip VI's support for Scotland explain how an unstable dynastic relationship became a prolonged war.
- 13:31Truces sustained the Hundred Years War's arms marketNotable Point
Intermittent peace treaties encouraged rearmament, enriching banking networks and weapon suppliers across Europe.
- 14:30The industrial system behind England's longbowsNotable Point
Longbow effectiveness depended on planted timber, compulsory practice, mass arrow production, warehouses, and severe standards for storage.
- 17:33Why Indian princely states did not build large naviesNotable Point
Without a local naval competitor to imitate or counter, princely states concentrated their military resources on armies.
- 23:34Merchant captains supplied England's professional fighting companiesChapter
Paid companies of archers and men-at-arms gave Edward III a practical professional force outside noble household retinues.
- 30:02QuestionHow did a medieval employer keep a mercenary company after its contract or pay ran out?AnswerQ&A
Continued pay was essential, but a king could also knight a successful captain and increase the status and troop types available to his company.
- 32:52Why invasion fleets gathered in the Low CountriesChapter
Tides, currents, and nearby ports made the Low Countries a recurring launch point for invasion plans against England.
- 35:49Merchant cogs became medieval warshipsNotable Point
Both fleets relied mainly on merchant vessels converted to carry soldiers, archers, and boarding parties.
- 37:31Chaining the French fleet surrendered maneuverChapter
The French attempt to build a chained defensive wall collapsed into immobile, disordered groups under wind and tidal pressure.
- 40:02QuestionHow accurate is the idea that a noble's first son inherited, the second joined the army, and the third entered the Church?AnswerQ&A
It was a plausible pattern, but younger sons' paths depended on education, family wealth, patronage, and available military or ecclesiastical offices.
- 42:40Ruthless English command met a divided French leadershipChapter
Edward III and William de Clinton brought personal trust and ruthlessness against French commanders with sharply different judgment.
- 45:05QuestionWhen did Britain restrict a peerage to one family member, and was that connected with the House of Lords?AnswerQ&A
The connection was partial: noble status carried a Lords seat and usually descended to the eldest son, but no precise origin date is given.
- 46:18Three-ship groups isolated the chained French vesselsChapter
English groups used two ships for archery support and a third for boarding, then worked methodically down the immobile French line.
- 47:16Prize incentives drove the merchant companies forwardNotable Point
Captured ships and goods paid the merchant companies, forcing Edward III to protect prizes so crews would return to the fight.
- 51:14The Flemish intervention completed the encirclementChapter
After waiting for the English advantage to become clear, Flemish forces struck the French rear and removed any remaining escape.
- 53:41QuestionCould the French crews simply unchain their ships once the formation began to fail?AnswerQ&A
They tried, but the ships had been chained too securely to regain freedom of movement during the fighting.
- 54:37Sluys destroyed a fleet and a field army at onceChapter
French losses of roughly 16,000-20,000 men and 190 ships dwarfed the casualties of Crécy or Agincourt.
- 58:57QuestionWhen does a battle with such unequal losses become a slaughter?AnswerQ&A
Sluys became a slaughter through encirclement, continued resistance, drowning, social barriers to surrender, and deliberate reprisals after capture.
- 1:01:56QuestionDo the estimates of 16,000-20,000 French losses mean deaths or all kinds of casualties?AnswerQ&A
They are presented as French deaths or losses, with several records supporting the range and some contemporary chronicles claiming roughly 30,000.
- 1:03:00QuestionHow many French prisoners were taken after the Battle of Sluys?AnswerQ&A
Fewer than one hundred appear to have survived as prisoners because many captives and swimmers were killed or executed in reprisal.
- 1:05:57QuestionWhy was chaining the French ships such a bad idea?AnswerQ&A
The formation could not remain orderly in a tidal estuary, so environmental forces tangled the ships and surrendered all freedom of maneuver.
- 1:07:18QuestionWhat do the casualty figures suggest about crew sizes and the strength of the two fleets?AnswerQ&A
The French had many more ships, but comparable fighting strength is plausible because their invasion fleet also carried large quantities of supplies.
- 1:09:43QuestionCould a captured noble pay his ransom immediately with the valuables he carried?AnswerQ&A
No; carried property was already forfeit, and the ransom was instead calculated from the captive's lands and income.
- 1:10:37Does Sluys qualify as a decisive battle?Chapter
The case for J. F. C. Fuller's verdict rests on the invasion stopped, the extraordinary French losses, and the campaign opportunities created for England.
- 1:13:15HMS Sluys commemorated the battle, but not its kingNotable Point
The Royal Navy named a Battle-class destroyer HMS Sluys, while Edward III never received the same individual honor despite commanding the victory.
- 1:16:10QuestionWere Edward III and the Black Prince considered to have broken cultural norms in their treatment of prisoners and civilians?AnswerQ&A
Yes; their conduct could fall outside contemporary expectations, although victory, reputation, and selective pardons softened later memory of it.
- 1:17:09QuestionWould the French have done better in a running fight on open water?AnswerQ&A
Possibly, but the ships may not have been maneuverable enough to close and sustain a running fleet action.
- 1:19:07QuestionWas Edward III a poor king despite being a successful warrior?AnswerQ&A
Not from every perspective; his Scottish record was harsh, but as king of England he generally worked within Parliament and rewarded service.
- 1:21:08Camperdown and Quiberon Bay test the meaning of decisivenessChapter
Later battles in the same invasion geography show how a naval victory can be decisive for one campaign without ending a war.
- 1:27:24QuestionHow many years of the Hundred Years War actually passed without fighting?AnswerQ&A
There were formal peace intervals, but violence and warfare among vassals continued, so few of them amounted to a complete stop.
- 1:27:52QuestionWhich late Hundred Years War battle gave France a decisive victory over the English?AnswerQ&A
Castillon in 1453, where French field artillery and John Talbot's premature, unsupported attack produced a decisive English defeat.
- 1:28:33Sluys did not guarantee English sea control for the whole warNotable Point
Later Castilian success and renewed invasion fears qualify any claim that Sluys established permanent English naval domination.
- 1:31:31Midway proves a battle need not end a war to be decisiveNotable Point
Midway's destruction of four Japanese fleet carriers provides a modern example of a decisive battle that did not end its war.
- 1:34:05Sluys was decisive because of the capability France lostChapter
Comparisons with Trafalgar, Midway, Camperdown, and Quiberon Bay support a final verdict based on destroyed military capacity rather than peace treaties.
- 1:39:33Taranto and Midway persuaded different navies about carrier powerNotable Point
Taranto demonstrated carrier striking power, while Midway convinced the United States that a carrier fleet remained viable after Pearl Harbor.
- 1:42:03Cogs suited the North Sea better than galleysNotable Point
High-sided cogs gave English archers an effective platform in local waters, so the merchant hulls were not simply inferior to Mediterranean-style galleys.
- 1:43:06England's military capacity did not require total mobilizationNotable Point
A deeply militarized political system let Edward III field a large expedition while retaining another substantial army in England.
- 1:44:40QuestionWhat books provide a good introduction to the Hundred Years War?AnswerQ&A
Gordon Corrigan's A Great and Glorious Adventure and Desmond Seward's The Hundred Years War are both recommended, depending on the reader's preferred perspective.
- 1:46:56QuestionWhat was the practical difference between a cargo ship and a warship in this period?AnswerQ&A
The distinction largely depended on intent and cargo, especially whether the vessel carried soldiers ready to fight.
- 1:47:24QuestionWhat happens if the Royal Navy and U.S. Navy go to war in the Atlantic in 1946?AnswerQ&A
Neither side has an easy victory; fleet dispersion, carrier forces, anti-submarine skill, industry, and Atlantic conditions make the result costly and highly contingent.
- 1:50:29Former Allied anti-submarine teams would face the U.S. NavyNotable Point
Canadian and Royal Navy anti-submarine teams would bring recent operational experience against a U.S. submarine force accustomed to fighting on the same side.
- 1:53:53QuestionWould the Soviet Union simply seize Europe during a 1946 Anglo-American war?AnswerQ&A
Not necessarily; Stalin would probably choose the alignment that best weakened the United States while preserving Soviet security in Europe.
- 1:56:11QuestionCould Soviet transport infrastructure support an invasion of Alaska in 1946?AnswerQ&A
It was conceivable because the Trans-Siberian Railway had carried major forces east in 1945, but the distance from the rail network to the Bering Strait left a serious logistical gap.
- 2:05:58Espionage does not fully explain the Soviet nuclear programNotable Point
Stolen information mattered, but Soviet scientists and engineers also made independent advances that a spy-only account obscures.
- 2:09:40QuestionHow might naval technology change if the First World War were replaced by a series of smaller wars?AnswerQ&A
Capital ships would probably grow larger and more numerous, while carrier aviation could mature earlier through repeated limited conflicts.
- 2:11:41Battle-tested admirals would shape the 1946 counterfactualNotable Point
Royal Navy experience in outnumbered Mediterranean operations would matter alongside American command quality, fleet location, and canal geography.
- 2:15:44QuestionIs the North Atlantic suitable for the kind of mass carrier warfare seen in the Pacific?AnswerQ&A
Not really; weather and doctrine would produce a different campaign, though British Atlantic and night-operating experience could be valuable.
- 2:17:51The Panama Canal would shape an Anglo-American naval warNotable Point
British plans against the Panama Canal could delay a U.S. Pacific Fleet transfer and redirect the war toward the Falklands or Indian Ocean.