When Henri returned to France as king in 1574 d'O found himself quickly receiving advancement, first as master of the wardrobe and first gentleman of the chamber.

In 1583 the disgraced d'O was granted a temporary appointment as lieutenant-general of lower Normandy on condition he soon pass it over to Matignon's son.

Dissatisfied with the regime, d'O went into alliance with the Catholic Ligue in 1585 using his influence in Normandy to support the forces of Elbeuf against the crown.

After a clash between Elbeuf's army and forces under Joyeuse a peace was agreed that was favourable to the Ligue, a term of which divested d'O of his command of Caen in return for his re-admission onto the kings conseil and an appointment as a Chevalier du Saint-Esprit.

Instructed by the king to retreat with his forces to the Louvre d'O was harried by armed Parisians all the way back and feared for his life.

D'O came with the troops of Saint Cloud to Henri IV, offering them to him on condition he renounce Protestantism and lead a Catholic kingdom.

[4] In 1575, upon Henri's return to France from the Polish-Lithuanian Commonwealth, d'O was among the favourites who accompanied the king as he entered Lyon, around this time the group began to be known by contemporaries as Mignons.

[9] Henri regularly travelled out from Paris with d'O when he needed a break from the city, as in February 1580 when he retired to Saint-Germain with d'O Joyeuse and Bernard de la Vallette.

He also frequented d'O's house as in May 1581 on his return from a visit to Joyeuse at Montrésor, he lodged at d'O's residence on the rue de la Plâtrière.

[13] After the re-consolidation of Normandy into a single governorship under Henri's favourite Anne de Joyeuse in 1583, d'O was granted the role of one of the lieutenant-generals of the key province.

The forces under Elbeuf united with those under Charles II de Cossé, Duke of Brissac and skirmished with Joyeuse.

[16] D'O, in his position as governor of Paris played a key role in the opening events of the Day of the Barricades, on Henri's instruction he conducted sweeps of the city attempting to pick up Guisard captains.

[17] The situation quickly fell out of royal control in the following days, Henri changed his policy, instructing d'O and other allies to draw the Swiss troops off the streets back to the Louvre in the hopes this would calm Paris.

[23] With Henri IV having converted to Catholicism and assumed control of Paris, he sought to reconcile the Liguer Parlementaires with the royalist faction of the court.