Wulfoald was the mayor of the palace

Mayor of the Palace

Mayor of the Palace was an early medieval title and office, also called majordomo, from the Latin title maior domus , used most notably in the Frankish kingdoms in the 7th and 8th centuries....

 of Austrasia

Austrasia

Austrasia formed the northeastern portion of the Kingdom of the Merovingian Franks, comprising parts of the territory of present-day eastern France, western Germany, Belgium, Luxembourg and the Netherlands. Metz served as its capital, although some Austrasian kings ruled from Rheims, Trier, and...

 from 656 or 661, depending on when Grimoald I was removed from that office (accounts vary: see his article for details), to his death and mayor of the palace of Neustria

Neustria

The territory of Neustria or Neustrasia, meaning "new [western] land", originated in 511, made up of the regions from Aquitaine to the English Channel, approximating most of the north of present-day France, with Paris and Soissons as its main cities...

 and Burgundy

Kingdom of Burgundy

Burgundy is a historic region in Western Europe that has existed as a political entity in a number of forms with very different boundaries. Two of these entities - the first around the 6th century, the second around the 11th century - have been called the Kingdom of Burgundy; a third was very...

 from 673 to 675.

He was the regent

Regent

A regent, from the Latin regens "one who reigns", is a person selected to act as head of state because the ruler is a minor, not present, or debilitated. Currently there are only two ruling Regencies in the world, sovereign Liechtenstein and the Malaysian constitutive state of Terengganu...

 of Austrasia during the minority of Childeric II

Childeric II

Childeric II was the king of Austrasia from 662 and of Neustria and Burgundy from 673 until his death, making him sole King of the Franks for the final two years of his life. He was the second eldest son of Clovis II. His elder brother Chlothar III was briefly sole king from 661, but gave...

 until 670. Even after Childeric achieved his majority, Wulfoald held the real power. In 673, he became the mayor of the palace in Neustria because Childeric had succeeded to its throne. But when Childeric died, Wulfoald had to flee to Austrasia. Wulfoald and the nobles proclaimed Dagobert II

Dagobert II

Dagobert II was the king of Austrasia , the son of Sigebert III and Chimnechild of Burgundy. The Feast Date of St Dagobert II is 23 December -Biography:...

 king, but Ebroin

Ebroin

Ebroin was the Frankish mayor of the palace of Neustria on two occasions; firstly from 658 to his deposition in 673 and secondly from 675 to his death in 680 or 681...

, the rival mayor of the palace of Neustria, tried to place Clovis III

Clovis III

Clovis III was the king of Austrasia from 675 to 676. Perhaps the son of Theuderic III or Clovis II, the Austrasian magnates who proclaimed him called him an illegitimate son of Clotaire III. They placed him on the throne in opposition to the young Dagobert II, the claimant of Wulfoald, the mayor...

 on the Austrasian throne to extend his influence. It wasn't until 676 that Wulfoald succeeded in putting Dagobert definitively on the throne. War continued on the border until 677, when Neustria recognised Austrasian independence. Dagobert was assassinated on December 23, 679. Wulfoald outlived his king for only a short while.