Louis was the son of Laurent de Maugiron, a key power broker in Dauphiné who became lieutenant-general of the province in 1578, and held the position until his death.

After the Peace of Monsieur broke down and civil war resumed, the young Maugiron fought in the campaign led by Alençon, seeing combat at the capture of La Charité-sur-Loire and Issoire.

Maugiron, now representing the king harassed his former patron, leading a legal case against one of his favourites, La Châtre and insulting the prince during a ball in early February.

[3] Captain Roussillon was responsible for ensuring Maugiron's family back in Dauphiné were kept appraised of developments concerning the young man.

[6] During the sixth civil war, he fought under the command of Alençon, who was leading the royal army, at the capture of La Charité-sur-Loire and Issoire, during the latter of which he lost an eye in May.

[10][2] At this time the king's sister Marguerite de Valois alleges that Henri's favourites constituted an informal parallel royal council, separate to the formal conseil des affaires, in which Maugiron was consulted on matters of state among others.

Her memoires are treated cautiously by modern historians, and Le Roux argues only a few of Henri's favourites began to exercise influence on administrative affairs.

Maugiron, keen to represent his patron took the opportunity of Alençon's presence at a ball for the wedding of one of the king's favourites, Saint-Luc, to insult his former protector.

Maugiron and Saint-Luc had previously pursued legal proceedings against one of Alençon's favourites, La Châtre as a way of attacking the king's brother.

[13] Rid of their enemy, the remaining favourites in the capital turned their attentions on the duke of Guise, persuading the king to remove the honour of grand maître from him, in favour of Caylus.

Arnauld Sorbin, who had given the sermon at the death of Montmorency and the king's brother Charles IX was tasked with overseeing the funerals.

The sculptor Germain Pilon was commissioned to create an elaborate tomb for the favourites, he fashioned large sarcophagi from black marble, with a kneeling figure reading from a book of hours on the top.

[22] Contemporaries deplored the pointless nature of the violence that had unfolded, with three of the participants dead or dying by the conclusion of the engagement.

[23] After the king ordered the assassination of the duke of Guise in December 1588, an angry crowd of Parisian Catholics, at the urgings of their preachers, took their anger out on the tombs of the favourites, destroying all three.