section_path: Early life and rise to power/Accession and reign with Carloman
section_name: Accession and reign with Carloman
paragraph_text: Accession and reign with Carloman
  
  There are only occasional references to Charlemagne in the Frankish annals during his father's lifetime. By 751 or 752, Pepin had deposed Childeric and replaced him as king. Early Carolingian-influenced sources claim that Pepin's seizure of the throne was sanctioned beforehand by Pope Stephen II, but modern historians dispute this. It is possible that papal approval came only when Stephen travelled to Francia in 754 (apparently to request Pepin's aid against the Lombards), and on this trip anointed Pepin as king; this legitimised his rule. Charlemagne was sent to greet and escort the Pope, and he and his younger brother Carloman were anointed with their father. Pepin sidelined Drogo around the same time, sending him and his brother to a monastery.
  
  Charlemagne began issuing charters in his own name in 760. The following year, he joined his father's campaign against Aquitaine. Aquitaine, led by Dukes Hunald and Waiofar, was constantly in rebellion during Pepin's reign. Pepin fell ill on campaign there and died on 24 September 768, and Charlemagne and Carloman succeeded their father. They had separate coronations, Charlemagne at Noyon and Carloman at Soissons, on 9 October. The brothers maintained separate palaces and spheres of influence, although they were considered joint rulers of a single Frankish kingdom. The Royal Frankish Annals report that Charlemagne ruled Austrasia and Carloman ruled Burgundy, Provence, Aquitaine, and Alamannia, with no mention made of which brother received Neustria. The immediate concern of the brothers was the ongoing uprising in Aquitaine. They marched into Aquitaine together, but Carloman returned to Francia for unknown reasons and Charlemagne completed the campaign on his own. Charlemagne's capture of Duke Hunald marked the end of ten years of war that had been waged in the attempt to bring Aquitaine into line.
  
  Carloman's refusal to participate in the war against Aquitaine led to a rift between the kings. It is uncertain why Carloman abandoned the campaign; the brothers may have disagreed about control of the territory, or Carloman was focused on securing his rule in the north of Francia. Regardless of the strife between the kings, they maintained a joint rule for practical reasons. Charlemagne and Carloman worked to obtain the support of the clergy and local elites to solidify their positions.
  
  Pope Stephen III was elected in 768, but was briefly deposed by Antipope Constantine II before being restored to Rome. Stephen's papacy experienced continuing factional struggles, so he sought support from the Frankish kings. Both brothers sent troops to Rome, each hoping to exert his own influence. The Lombard king Desiderius also had interests in Roman affairs, and Charlemagne attempted to enlist him as an ally. Desiderius already had alliances with Bavaria and Benevento through the marriages of his daughters to their dukes, and an alliance with Charlemagne would add to his influence. Charlemagne's mother, Bertrada, went on his behalf to Lombardy in 770 and brokered a marriage alliance before returning to Francia with his new bride. Desiderius's daughter is traditionally known as Desiderata, although she may have been named Gerperga. Anxious about the prospect of a Frankish–Lombard alliance, Pope Stephen sent a letter to both Frankish kings decrying the marriage and separately sought closer ties with Carloman.
  
  Charlemagne had already had a relationship with the Frankish noblewoman Himiltrude, and they had a son in 769 named Pepin. Paul the Deacon wrote in his 784 Gesta Episcoporum Mettensium that Pepin was born "before legal marriage", but does not say whether Charles and Himiltrude ever married, were joined in a non-canonical marriage (friedelehe), or married after Pepin was born. Pope Stephen's letter described the relationship as a legitimate marriage, but he had a vested interest in preventing Charlemagne from marrying Desiderius's daughter.
  
  Carloman died suddenly on 4 December 771, leaving Charlemagne sole king of the Franks. He moved immediately to secure his hold on his brother's territory, forcing Carloman's widow Gerberga to flee to Desiderius's court in Lombardy with their children. Charlemagne ended his marriage to Desiderius's daughter and married Hildegard, daughter of count Gerold, a powerful magnate in Carloman's kingdom. This was a reaction to Desiderius's sheltering of Carloman's family and a move to secure Gerold's support.