With peace declared in 1559, he returned to Dauphiné, where he worked with the lieutenant-general La Motte Gondrin, in his attempts to stamp out Protestantism in the region.
Maugiron found himself promoted to lieutenant-general of the governorship and for the next few months fought a losing battle trying to contain Adrets, before giving up and retreating into Burgundy to link up with Tavanne's forces.
[7] In April 1562 the lieutenant general of Dauphiné and acting governor, in the absence of the duke of Guise, La Motte Gondrin was assassinated.
[11] This would represent the highpoint of his success in the early months, and Adrets was able to reverse this capture, his much larger force seizing Grenoble on 26 June.
[15] As the year came to a close his forces were called north to the main royal army, and for his services during the Battle of Dreux he would be granted a company of soldiers.
[16] With the Assassination of the Duke of Guise (1563) in February 1563 at the siege of Orléans, Catherine appointed Charles, Prince of La Roche-sur-Yon as governor of Dauphiné and confirmed Maugiron's lieutenant generalcy.
Having hoped to gain entry via the betrayal of the gates, he was disappointed, and upon hearing of the approach of forces under Antoine de Crussol he burned the suburbs of the town and retreated.
[21] The following month he was replaced as lieutenant general by the baron de Gordes, Maugiron was reduced to the governorship of the town of Vienne, the court hoping the honour of the order would make the pill easier to swallow.
[22] Despite his demotion when civil war broke out again in 1567 he served the crown loyally, assisting in the defence of Lyon from an attack by troops under Paul de Mouvans.
The approach of Coligny on his march north through the country forced Gordes and Maugiron to retreat from an attempt to capture a fort on the Rhône.
[25] During the Massacre of Saint Bartholomew, Maugiron was tasked with killing Protestant leaders in the Saint-Germain-des-Prés region of Paris including Montgommery, however he would be unsuccessful in murdering this target.
[26] After spending some time out of royal favour, in 1578 he was granted his old position of lieutenant-general of Dauphiné once more and thus acting governor in the absence of Montpensier, by king Henri III.
[28] Maugiron proceeded to harness a peasant army that was currently active, having risen up in Romans against their oligarchical administration, under the commander Paulmier.