La Rochepot accompanied the vanguard for the French invasion of Italia in late 1524, and was present at the disastrous Battle of Pavia at which the royal army was destroyed, and the king made captive.

La Rochepot was likewise made captive, but was able to raise his ransom quickly and returned to France to inform the Paris Parlement of the king's condition.

At this time, with Vendôme's son too young to immediately succeed to the office, La Rochepot was temporarily granted the responsibility of governing Picardie as a full governor.

Relieved of his authority, La Rochepot was compensated with the governate of the Île de France while he returned to the position of deputy governor in Picardie.

[5] For La Rochepot, his new bride brought the Picard lands of Offrémont, Mello, Ancre and Bray upon the death of Louise de Nesle who had possessed them.

This could involve requests to remove garrisons, aid in disputes against local ecclesiastical authorities (including the bishop of Beauvais, his cousin Charles de Villiers) or protect the town from marauding troops.

[24] At the time of the English invasion of October 1523, La Rochepot (as he was now titled after the partage with his brother) was in the north, and sent out orders to ensure that all supplies were brought within the walls of Beauvais so they could not be seized.

[21] La Rochepot made a good impression on the Parlement and was named for the government of the Île de France alongside his father.

[29] The crisis brought about by Pavia created a situation in which the absence of Picardie's governor (the duc de Vendôme) at court was unacceptable to the Parlement of Paris.

[30] The following year, in August, La Rochepot succeeded François Robertet to the office of bailli du Palais (bailiff of the royal palaces).

[6] During periods of warfare in the north, the volume of administration La Rochepot dealt with increased dramatically, and from May to July 1536, he received 68 despatches which survive.

[33] The rigours of war caused some losses to La Rochepot's territories in Picardie (in particular the sack of Ancre), therefore in compensation Montmorency secured for him the baillage of Caen in Normandie.

It was on this understanding, that his position was a stopgap to handle the present military situation that La Rochepot was therefore issued letters of provision to make him governor on 13 May of that year.

[37] During this year he resigned the office of bailli (bailiff) and concierge of the royal palaces in favour of the Montmorency client Nicolas Berthereau.

[39] As governor of Picardie, La Rochepot was expected to handle many of the expenses required of the office himself, putting forward resources in his possession and then later petition the crown for reimbursement.

[43] The Île de France, in contrast with the great provincial governates, enjoyed alternate channels by which it could exert its influence on the state.

[44] Over his career, 93% of his surviving correspondence would be sent from either Picardie, or the Île de France, giving La Rochepot quite a focused area in which he was politically active.

[45] La Rochepot was not however deprived of his responsibilities entirely in Picardie, and returned to the position he had occupied prior to 1537, as the deputy governor to Vendôme.

[46] During 1538 La Rochepot effectively enjoyed practical control of both Picardie and the Île de France, which was militarily convenient as the latter province was critical for the supply of armies in the former.

[47] In December 1538 La Rochepot made his ceremonial entrance into Paris, flanked by 36 nobleman, mainly of esteemed Picard families such as the Créqui and Estourmel.

Montmorency was not however naïve, and during this period instructed La Rochepot to ensure that the fortifications of Champagne and Picardie were in a good and complete state.

[31] At court, La Rochepot enjoyed the service of the influential courtier Genouillac with whom he maintained a correspondence and exchanged letters of recommendation.

[54] On 21 May 1542, François revoked all of the charges to governates in the kingdom, thus dispossessing Montmorency of Languedoc and La Rochepot of the Île de France.

He then proceeded to re-appoint all the other governors of the kingdom back to their former offices, with the exception of La Rochepot and Montmorency, thus achieving by a circuitous root an acceptable way to their honour to remove them from their powers.

[55] He was further dismissed from his responsibilities in Picardie, replaced first by Michel de Barbançon in June 1541 and then by Oudart du Biez, the governor of Boulogne.

La Rochepot's older brother was restored to his governate of Languedoc, re-established with the authority of Constable and granted his backpay from the years of disgrace.

Henri resolved to crush the revolt with force, and dispatched La Rochepot's brother as one pincer of an attack, up through Languedoc, while the duc d'Aumale travelled down through Poitou.

[67] During the campaign against the English to recapture Boulogne, La Rochepot and his nephew Coligny rendezvoused with the duc d'Aumale at Montreuil in December 1549.

[68] On 8 January 1550, La Rochepot, Coligny, the secrétaire d'état (secretary of state) Guillaume Bochetel and councillor André Guillart were dispatched to negotiate with the ambassadors of Edward VI in England.

[72] When in 1551, La Rochepot made his entry into the hôtel de ville (town hall) of Paris, he was accompanied by an entourage of 30-40 gentleman as a show of his private power.