Battle of Bidossa 788 • Early Middle Ages
Discovering the battle
787 or 788 (capture); political sequel to Worms 790 French defeat

Battle of Bidossa

Basque troubles after Roncevaux – capture of Chorso (787/788); no attested “Battle of the Bidossa” · Aquitaine / Gascony (exact capture site not fixed by Wikipedia; the “Bidasoa valley” as a pitched battlefield is not attested)

Summary

Major correction: French/English Wikipedia knows no “Battle of the Bidossa” in 788. What is attested: in 787 or 788 Chorso (Torson), duke of Toulouse and former regent of Aquitaine for Louis the Pious, was captured by the Gascon Adalric and forced to swear allegiance to Duke Lupus of Gascony before release (French/English Wikipedia Chorso; William of Gellone). No pitched-battle narrative on the Bidasoa. In 790 at Worms Charlemagne dismissed Chorso and replaced him with William of Gellone; Adalric was sentenced to exile.

Historical context

After Roncevaux (778) Basques entered Aquitaine and contested Frankish authority. Chorso, a Frank, count of Toulouse from ~778, had helped take Girona (785) entrusted to Rostany. His capture by Adalric was a diplomatic-military humiliation: a Carolingian dux forced to swear to a Gascon duke. Louis summoned Adalric; Charlemagne decided at Worms (790). The corpus “Bidossa” entry unsourcedly fused a Frankish victory and a later ambush — recentred here on Chorso/Adalric.

Tactics

No pitched-battle tactics on the Bidasoa are described in French/English Wikipedia (Chorso, William of Gellone). Attested event: capture of Chorso by Adalric, forced oath to the duke of Gascony (Lupus), then release — political coercion and ruse more than an open-field clash. Unsourced tales of a “Frankish victory then treacherous negotiation on the Bidasoa” were removed for lack of attestation.

Consequences

Dismissal of Chorso at the Worms assembly (790); William of Gellone replaces him and becomes chief defender of Aquitaine. Adalric is sentenced to exile. Continued Basque pacification under William. The episode shows the limits of Frankish authority after Roncevaux and prepares William’s role in the Spanish March and at Barcelona (801).

Location

Place : Aquitaine / Gascony (exact capture site not fixed by Wikipedia; the “Bidasoa valley” as a pitched battlefield is not attested)
Coordinates : 43.3619°N, 1.7875°W

Related battles

778 Early Middle Ages Defeat

Battle of Roncesvalles

Pyrenean pass / defile (exact site uncertain; memorial at Roncesvalles / Orreaga; Valcarlos sometimes suggested) · Carolingian campaign of 778 in Spain – Roncevaux ambush

On 15 August 778, as Charlemagne withdrew from Spain after failure before Zaragoza and the razing of Pamplona’s walls, Wascones ambushed the Frankish rearguard in a Pyrenean defile (exact site debated: Roncesvalles / Valcarlos). The Revised Royal Annals and Einhard describe the attack on the extremum agmen, disorder across the army, deaths of several aulici (Roland, Eggihard, Anselm) and plunder of the baggage; the enemy vanished at once. Charlemagne’s only major personal battlefield setback. Two centuries later the Song of Roland (11th c.) turns the episode into war against Saracens and epic myth — distinct from the historical event.

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790 Early Middle Ages Victory

Battle of Llívia

Aquitaine / Toulouse (Worms assembly) — Llívia in Cerdanya is not an attested pitched battlefield for 790 in Wikipedia · Basque pacification and Toulouse succession (790) – no attested pitched “Battle of Llívia”

Major correction: no French/English Wikipedia page attests a pitched battle at Llívia (Cerdanya) c. 790 between William of Toulouse and an Umayyad column. What is documented for 790: at Worms Charlemagne dismissed Chorso, exiled Adalric, and appointed William of Gellone to Toulouse; William then imposed peace on the Basques (linked French notices; English Wikipedia: rebellion dissolved after capturing/exiling Adalric in 790). Urgell had been integrated c. 789. The entry is recentred on these attested facts.

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824 Early Middle Ages Defeat

Battle of Roncevaux Pass (824) / Valcarlos

Roncevaux Pass / Pamplona–Saint-Jean-Pied-de-Port road (Valcarlos / Luzaide sometimes linked; exact site debated as in 778) · Aquitainian expedition against Pamplona – second (or third) Battle of Roncevaux (824)

In 824, a Carolingian expedition was sent to the Pyrenees to regain control over Pamplona, ​​a strategic city which had freed itself from Frankish authority. Led by Counts Aeblus (Ebles) and Aznar Sánchez, the army crossed the passes of present-day Navarre. But the troop, made up of men from Gascony and Aquitaine, advances in difficult and narrow terrain. In the Valcarlos pass, the Basques, allied with Muslim horsemen from Pamplona, ​​set up an ambush. The Frankish army is surrounded and crushed: Aeblus is captured and sent prisoner to Cordoba, while Aznar is freed because of his family ties with the Basque nobility. This rout, compared by chroniclers to that of Roncesvalles in 778, highlights the fragility of Carolingian control over upper Navarre. Wikipedia note: episode = Battle of Roncevaux Pass (824), ordered by Pepin of Aquitaine; Íñigo Arista (+ probable Banu Qasi); Aeblus to Córdoba, Aznar freed; last Frankish intervention; birth of Kingdom of Navarre. Valcarlos names the same clash.

AeblusvsBasques of Pamplona under Íñigo Arista