Neustria in the context of "Austrasia"

Under the Merovingian dynasty, the mayor of the palace or majordomo,(Latin: maior palatii or maior domus) was the manager of the household of the Frankish king. He was the head of the Merovingian administrative ladder and orchestrated the operation of the entire court. He was appointed by the king from among the magnates, the most powerful families. Austrasia, Neustria and Burgundy had their own mayor of the palace. After Chlothar II, who ruled over the entire Frankish Kingdom, had ordered the execution of Warnachar, the mayor of Burgundy, the magnates of Burgundy declared in 626 not to want their own mayor anymore. This declaration marks the effective end of the Burgundian court and the beginning of the Neustrian-Burgundian political alliance against Austrasian influence. The Austrasian magnates revolted and the Battle of Tertry of 687 became the Austrasian victory with Pepin of Herstal as their leader and the new mayor of the palace.

During the second half of the seventh century, the office evolved into the "power behind the throne". At that time the mayor of the palace held and wielded the real and effective power to make decisions affecting the kingdom, while the kings were increasingly reduced to performing merely ceremonial functions, which made them little more than figureheads (rois fainéants, 'do-nothing kings'). The office may be compared to that of the peshwa, shōgun, sarvadhikari, or prime minister, all of which have similarly been the real powers behind some ceremonial monarchs.

Pepin the Short (Latin: Pipinus; French: Pépin le Bref; German: Pippin der Kurze; c. 714 – 24 September 768) was King of the Franks from 751 until his death in 768. He was the first Carolingian to become king.

Pepin was the son of the Frankish prince Charles Martel and his wife Rotrude. Pepin's upbringing was distinguished by the ecclesiastical education he had received from the Christian monks of the Abbey Church of St. Denis, near Paris. In 741, after Pepin and his older brother Carloman besieged their half-brother Grifo (who did not accept their father's plans for succession) at Laon and imprisoned him in a monastery, he and Carloman succeeded their father as the Mayor of the Palace; In effect, Pepin reigned over Francia jointly with his elder brother, Carloman. Pepin ruled in Neustria, Burgundy, and Provence, while his older brother Carloman established himself in Austrasia, Alemannia, and Thuringia. The brothers were active in suppressing revolts led by the Bavarians, Aquitanians, Saxons, and the Alemanni in the early years of their reign. In 743, they ended the Frankish Interregnum [fr] by choosing Childeric III, who was to be the last Merovingian monarch, as figurehead King of the Franks.

The Carolingian civil war was a violent crisis over the succession to the Carolingian Empire following the death of Emperor Louis the Pious in June 840 and lasting until the Treaty of Verdun in August 843. Louis's eldest son, the emperor Lothar I, laid claim to an undivided empire, while his younger brothers Louis the German and Charles the Bald sought large kingdoms of their own on the basis of previous divisions planned by the late emperor. Their nephew, Pippin II, laid claim to Aquitaine.

After Louis the Pious's death, Lothar moved immediately to disregard the division of the empire and secure for himself his father's imperial position. He reached out to Pippin in Aquitaine for support against Charles. Not content with Bavaria alone, Louis the German occupied the Rhineland laying claim to all of Germania. The first military move of the budding civil war was Lothar's campaign that forced Louis from the Rhineland in August. It increased Lothar's prestige in the east, but ended in an armistice. Lothar then marched to the Seine in September, laying claim to Neustria, before reaching a truce with Charles.

Carloman (between 706 and 716 – 17 August 754) was the eldest son of Charles Martel, mayor of the palace and duke of the Franks, and his wife Chrotrud of Treves. On Charles's death (741), Carloman and his brother Pepin the Short succeeded to their father's legal positions, Carloman in Austrasia, and Pepin in Neustria. He was a member of the family later called the Carolingians and it can be argued that he was instrumental in consolidating their power at the expense of the ruling Merovingian kings of the Franks. He withdrew from public life in 747 to take up the monastic habit, "the first of a new type of saintly king", according to Norman Cantor, "more interested in religious devotion than royal power, who frequently appeared in the following three centuries and who was an indication of the growing impact of Christian piety on Germanic society".

Chilperic I (c. 539 – September 584) was the king of Neustria (or Soissons) from 561 to his death. He was one of the sons of the Frankish king Clotaire I and Queen Aregund.

Pepin II (c. 635 – 16 December 714), commonly known as Pepin of Herstal, was a Frankish statesman and military leader who was the de facto ruler of Francia as the Mayor of the Palace from 680 until his death. He took the title Duke and Prince of the Franks upon his conquest of all the Frankish realms.

The son of the powerful Frankish statesman Ansegisel, Pepin worked to establish his family, the Pippinids, as the strongest in Francia. He became Mayor of the Palace in Austrasia in 680. Pepin subsequently embarked on several wars to expand his power. He united all the Frankish realms by the conquests of Neustria and Burgundy in 687. In foreign conflicts, Pepin increased the power of the Franks by his subjugation of the Alemanni, the Frisians, and the Franconians. He also began the process of evangelisation in Germany.

Chlothar II, sometimes called "the Young" (French: le Jeune), (May/June 584 – 18 October 629) was king of the Franks, ruling Neustria (584–629), Burgundy (613–629) and Austrasia (613–623).

The son of Chilperic I and his third wife, Fredegund, he started his reign as an infant under the regency of his mother, who was in an uneasy alliance with Chlothar's uncle King Guntram of Burgundy, who died in 592. Chlothar took power upon the death of his mother in 597; though rich, his realm was one of the smallest portions of Francia. He continued his mother's feud with Queen Brunhilda with equal viciousness and bloodshed, finally achieving her execution by dismemberment in 613, after winning the battle that enabled Chlothar to unite Francia under his rule. Like his father, he built up his territories by seizing lands after the deaths of other kings.