WI France Wins Agincourt (English effects)

What if Henry V died in the noted battle in 1415, and the French prevailed? How this affects the course of the conflict is relevant, but I'm especially interested here in how this affects the struggle for the English crown, and subsequently England itself. At the time of our noted battle, Henry had three brothers, all unmarried, as well as two brothers in law, one of whom was King of Denmark and Sweden; and on top of that, the Lancaster line wasn't on the securest of footing prior to renewal of hostilities with France, meaning we could have another Plantagenet claimant, or several. Does this lead to an earlier or alternate War of the Roses? If so, how does this change things for the English state?
 
Much depends on how competent Thomas is, and what his relationship with his brothers is like. Regardless, whatever his faults, Thomas will likely be a far, far more competent king than Henry VI and probably more active/successful in stamping down on any discontent (or at least not letting royal authority break down as completely as it did under Henry VI).

As for other Plantagenet claimants- Edmund Mortimer, 5th Earl of March, was loyal to Henry IOTL after being used as a pawn of his uncle and the Percies in his youth- he obviously informed on the Southampton plotters. So it depends on if his loyalty transfers to Thomas and the Lancastrians more generally. He doesn't seem to be overly ambitious.

That said, Thomas was supposedly hotheaded (precipitating his death at the Battle of Bauge) so I suppose it's possible he could alienate Mortimer and trigger a rebellion. Say, people plot on Mortimer's behalf, Thomas denounces Mortimer, Mortimer flees, rebellion. Though Mortimer's health is far from robust- he got dysentery at the siege of Harfleur and ultimately died young, so he mightn't necessarily last too long.

Elsewise, does the Duke of York still die at Agincourt? Because if so, his nephew and heir Richard is 4 and unlikely to cause trouble (and King Thomas might be able to deny Richard his inheritance because of his father's treason).

Also, I think Thomas is already married- to Margaret Holland, and has a bunch of Beaufort step-kids by her. But Margaret's father and brothers are already dead, so this marriage doesn't provide him a great deal of domestic support. IIRC correctly he was relatively close to his stepsons IOTL- John and Thomas Beaufort were captured after accompanying him at Bauge- so when they're grown up they could bolster his regime. He's also got two step-daughters to perform diplomatic manoeuvres with.

Of course he didn't have any kids by Margaret IOTL, despite a decade of marriage, so that could cause headaches down the line.

So, there might be some quarrelling with his brothers (John and Humphrey obviously didn't get along IOTL), but without a 15-year minority followed by a terrible king the domestic situation probably doesn't go as thoroughly to shit as it did IOTL. But with defeat at Agincourt (and the death of the English king) and the need for Thomas to sort things out in England (at least in the short term), then the English position in France could crumble.
 
Depends, much gets credited to Longbowmen at Agincourt even though arrows can't pierce plate and the ground was muddy. Contemporary chronicles note that many French knights survived to clash against the English in hand to hand regardless of arrow fire. This includes the future Louis II of Hungary and Bohemia.

I'd think with a defeat at Agincourt the English would adopt gunpowder weapons faster, instead of holding onto the Myth of Agincourt
 
But with defeat at Agincourt (and the death of the English king) and the need for Thomas to sort things out in England (at least in the short term), then the English position in France could crumble.
And if Thomas still dies in France shortly after -- well like you said, he didn't have any kids with Margaret, his brothers didn't get along, and it's possible he could have antagonized Mortimer enough to start another rebellion. Alternatively, he could withdraw from France to get his own home country in order, preventing just this kind of mess... though it is more fun to imagine things going to shit.
 
And if Thomas still dies in France shortly after -- well like you said, he didn't have any kids with Margaret, his brothers didn't get along, and it's possible he could have antagonized Mortimer enough to start another rebellion. Alternatively, he could withdraw from France to get his own home country in order, preventing just this kind of mess... though it is more fun to imagine things going to shit.

Though abandoning hard-won English gains in France could also see him get criticised- the complete and final collapse of the English regime in France was one of the many things to cause discontent against Henry VI IOTL.

Just having two English kings die violent deaths in quick succession will be devastating for stability, and if you add squabbling betwixt John and Humphrey and Mortimer floating about, it'll get messy. And, if Thomas dies we'll get a King John II (isn't that an auspicious name for an English monarch) trying to hold things together.
 
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Though abandoning hard-won English gains in France could also see him get criticised- the complete and final collapse of the English regime in France was one of the many things to cause discontent against Henry VI IOTL.
That too. Plus you've got other players, if not claimants -- you mentioned the Beauforts, I mentioned Eric of Pomerania, and of course the French...
 
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That too. Plus you've got other players, if not claimants -- you mentioned the Beauforts, I mentioned Edward of Pomerania, and of course the French...

Eric you mean? I'm not sure he's in a position to do much. Both geographically and he might potentially have his own stuff to deal with (Scandinavia is out of my wheelhouse).
 
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