Why did Henry IV convert to Roman Catholicism in 1593?

Henry IV converted to Roman Catholicism in July 1593 primarily as a pragmatic political maneuver to end the protracted religious wars that had left France on the brink of disintegration.1

Following his succession, Henry faced significant resistance from the Holy League, and his military efforts to secure the kingdom were exhausting his resources and troops. By converting, he removed the primary legitimate pretext for his opponents' resistance. This strategic decision proved effective: following his conversion, major cities such as Orléans, Lyon, and eventually Paris submitted to his authority.1

While many contemporaries questioned the sincerity of his change in faith, the conversion was instrumental in reunifying the state and establishing the stability necessary for his later governance, including the eventual issuance of the Edict of Nantes in 1598, which granted religious freedoms to the Protestant minority.12