The alliance never made - a Plantagenet timeline

The alliance never made
On 1 June 1199, Pope Innocent III eventually decided that the Archbishopric of Dol should be subordinated to the Metropolitan of Tours and deprived the archbishop of his title and pallium. The archbishopric then became a bishopric again. Constance disagreed with this decision, which gave an advantage to Philip Augustus over Brittany, and was consequently excommunicated.

Constance took Guy of Thouars as her next husband in September or October 1199.

Between 1198 and the time of her death due to complications from delivering her twin daughters, Constance ruled with her son Arthur as co-ruler. Throughout these years, Constance advised her son towards a French alliance, pursuing the policy of her late husband Geoffrey II.

At her request Eleanor was released from royal custody and united with her and Arthur in France, she would marry her daughter Eleanor to Louis, the Lion in 1199 while betrothing her son, Arthur to Marie of France depriving John I of England of a chance to make peace with the French under Philip II of France.[1]

Constance of Brittany - Freepedia

1. POD
 
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I really hope John kicks the bucket and arthur gets england before he dismantles the angevin empire with his sheer imcompetence
 
The two Angouleme girls and the Death of Prince Arthur
Eleanor of Aquitaine and John I of England were shocked at the decision of the Duchess of Brittany to ally with the King of France and marry her daughter, Eleanor to the son of the French King, John of England would marry Isabella of Angouleme, the former betrothed of Hugh of Lusignan, learning that Isabella of Angouleme is married to Isabella of Angouleme Hugh IX of Lusignan would marry his son, Hugh of Lusignan to Mathilde of Angouleme, a cousin of Isabella of Angouleme, Princess Urraca of Castile was jilted by Prince Louis in favor of Eleanor of Brittany who eventually becomes the Queen of Portugal.

The marriage of Hugh of Lusignan to Mathilde of Angouleme would create a rival claimant against the father of Isabella of Angouleme, Aymer, Count of Angouleme, the marriage of Isabella of Angouleme to John of England and the rivalry of Mathilde and Isabella of Angouleme would create issues between England and France over the inheritance of Angouleme after the death of Count Aymer of Angoueleme.

On 1202, with the support of the French and Hugh of Lusignan, Arthur I of Brittany would fight against his uncle.
 
Death of Arthur I of Brittany
Battle against John I of England

Arthur embarked on a campaign in Normandy against John in 1202. Poitou revolted in support of Arthur. The Duke of Brittany besieged his grandmother, Eleanor of Aquitaine, John's mother, in the Château de Mirebeau. John marched on Mirebeau, taking Arthur by surprise on 31 July 1202. Arthur was captured by John's barons on 1 August, and imprisoned in the Château de Falaise in Falaise, Normandy.

Imprisonment and Disappearance

Arthur was guarded by Hubert de Burgh at the Chateau de Falaise. According to contemporaneous chronicler Ralph of Coggeshall, John ordered two of his servants to blind and castrate the duke. De Burgh could not bring himself to let Arthur be mutilated. Fearful of John, de Burgh leaked news that Arthur had died of natural causes. This news infuriated Brittany, who suspected that Arthur had been murdered. The following year Arthur was transferred to Rouen, under the charge of William de Braose. Arthur vanished in April 1203, in the background of several military victories by Philip II of France against King John.

Arthur's disappearance gave rise to various stories. One account was that Arthur's gaolers feared to harm him, and so he was murdered by John directly and his body dumped in the Seine. The Margam Annals provide the following account of Arthur's death:

“After King John had captured Arthur and kept him alive in prison for some time, at length, in the castle of Rouen, after dinner on the Thursday before Easter, when he was drunk and possessed by the devil ['ebrius et daemonio plenus'], he slew him with his own hand, and tying a heavy stone to the body cast it into the Seine. It was discovered by a fisherman in his net, and being dragged to the bank and recognized, was taken for secret burial, in fear of the tyrant, to the priory of Bec, which is called St Mary of the Meadow.”

William de Braose is also rumoured to have murdered Arthur. After the young man's disappearance, he rose high in John's favour receiving new lands and titles in the Welsh Marches. Many years after Arthur's disappearance, and just prior to a conflict with King John, de Braose's wife Maud de Braose accused the king of murdering Arthur.

Not only the Bretons, but even Philip II, were ignorant of what actually happened, and whether Arthur was alive or dead. Whatever his fate, Arthur left no known issue. William promised to direct the attack of Mirebeau on condition he was consulted on the fate of Arthur, but John broke the promise, causing him to leave John along with Aimeri of Thouars and siege Angers.

Arthur I of Brittany - Freepedia
 
Children of Eleanor of Brittany, Duchess of Brittany, Queen of France and Louis VIII
Eleanor (January 1204 d. 1235), Queen of Castile and Duchess of Gascony

Adela (December 1206 d. 1240), Queen of Scotland

Philip III of France (October 10, 1208 d. 1260) King of France as successor to his father.

Geoffroy (b. d. January 26, 1212), twin of Arthur.

Arthur (b. and d. Lorrez-le-Bocage, 26 January, 1212), twin of Geoffroy.

Louis (April 25, 1213), Duke of Brittany and Count of Provence

Robert (September 25, 1215 – 9 February 1250, Count of Artois.

Philip (February 20, 1217 – 1220).

John (July 21, 1218 – 1232), Count of Anjou and Maine

Geoffroy (November 11, 1220 – 21 August 21, 1271, Corneto), Count of Poitou and Auvergne, and by marriage, of Toulouse.

Isabelle (March 1222 – 23 February 1270), Queen of Sicily

Charles (December 1223 – 7 January 1285), Count of Anjou and Maine
 
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Guy of Thouars
Guy of Thouars (died April 13, 1213) was the third husband of Constance, Duchess of Brittany, whom he married in Angers, County of Anjou between August and October 1199 after her son Arthur of Brittany entered Angers to be recognized as count of the three countships of Anjou, Maine and Touraine. He was an Occitan noble, a member of the House of Thouars. He is counted as a duke of Brittany, jure uxoris, from 1199 to 1201.

Between 1196 and the time of her death in 1201, while delivering twin daughters, Constance ruled Brittany with her young son Arthur I, Duke of Brittany as co-ruler. Duke Arthur I was captured in 1202 by their uncle John, King of England and disappeared in 1203, he was succeeded by his his full elder sister Eleanor of Brittany.

In 1204, Guy de Thouars undertook the siege of the Norman island fortress of Mont Saint-Michel. Because the abbey would not surrender, he set fire to the village and massacred the population. He was obliged to beat a retreat under the powerful walls of the abbey. The fire which he himself lit extended to the buildings, and the roofs were engulfed in flames. Philip II paid Abbot Jordan for the reconstruction cost.

Guy of Thouars died in 1213 in Nantes, and was buried with Constance at Villeneuve Abbey, now in the commune of Les Sorinières, outside of Nantes. 'Situated at Nantes south gate, Abbey de Villeneuve' was 'founded in 1201 by Constance de Panthièvre, the Duchess of Brittany.
 
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Brittany being in English camp after Arthur was killed by John make ZERO sense. Alix de Thouars in OTL became Duchess of Brittany ONLY because Eleanor was John’s prisoner and Brittany had NO intention to let John use that for ruling them. And taking away that, Brittany has ZERO reasons for allying with England, specially against France, not when the only thing who Brittany absolutely do NOT wanted in this period was being English vassals
 
Brittany being in English camp after Arthur was killed by John make ZERO sense. Alix de Thouars in OTL became Duchess of Brittany ONLY because Eleanor was John’s prisoner and Brittany had NO intention to let John use that for ruling them. And taking away that, Brittany has ZERO reasons for allying with England, specially against France, not when the only thing who Brittany absolutely do NOT wanted in this period was being English vassals
But in this timeline, Brittany is annexed to France and the nobles decided to rebel, I changed the word vassal to ally, because Brittany would not want to be annexed to France in this scenario as Anjou, Maine, Brittany, and Touraine were annexed at the death of Arthur of Brittany.
 
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The Partition of Aquitaine
Marriage and Foreign relations

Around 1200 when his brother in law John was on the English throne, Alfonso began to claim that Gascony was part of Eleanor's dowry, though there was nothing in the marriage treaty to indicate this. In 1205, Philip II and Alfonso VIII would invade Aquitaine, Philip II would annex Aquitaine to the royal domain while Alfonso VIII would get Gascony which was part of his wife’s dowry.

Alfonso VIII - Freepedia
 
But in this timeline, Brittany is annexed to France and the nobles decided to rebel, I changed the word vassal to ally, because Brittany would not want to be annexed to France in this scenario as Anjou, Maine, Brittany, and Touraine were annexed at the death of Arthur of Brittany.
Brittany can ask for the second son of Eleanor to become his mother’s heir in Brittany and they would still NOT ally with England
 
Brittany can ask for the second son of Eleanor to become his mother’s heir in Brittany and they would still NOT ally with England
Yes, but in this scenario, Brittany got annexed to France after the death of Arthur I and it would take time for Eleanor to have sons.
 
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The Traitor Princess
Portrayals

Eleanor of Brittany is the antagonist and titular character in Jean Plaidy's novel The Traitor Princess.

In her poem The guilt of Eleanor of Bretagne, the English novelist and poet Menella Bute Smedley imagined Eleanor's guilt.

The character Eleanor of Brittany is featured in the history play King John

Eleanor of Brittany was played by Charlize Theron in the movie adaptation of Robin Hood

Eleanor of Brittany - Freepedia
 
Yes, but in this scenario, Brittany got annexed to France after the death of Arthur I and it would take time for Eleanor to have sons.
I changed the plot, I had Brittany annexed to France until a later point.
Good. Keep in mind who, like Eleanor of Aquitaine and Louis VII, Eleanor of Brittany’s lands would NOT be annexed to France, at least NOT until one of Eleanor’s sons inherited both them and France (so if any of Eleanor’s lands go to a younger son they would NEVER be annexed to France)
 
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