Did Henry IV’s conversion to Catholicism end resistance to his rule?

Henry IV’s conversion to Roman Catholicism in July 1593 did not immediately end all resistance to his rule, though it was a decisive turning point.1

While the conversion removed the primary legitimate pretext for opposition, causing many towns to submit to his authority and leading to the surrender of Paris in 1594, it did not stop all conflict. Spain continued to support remaining resistance forces in France, most notably in Brittany under the Duke de Mercoeur.1

To fully secure his kingdom, Henry IV had to declare war on Philip II of Spain in 1595 and conduct further military operations against the League and its Spanish allies. Resistance only truly concluded after the Duke de Mercoeur came to terms in 1598, the Treaty of Vervins was signed with Spain, and the Edict of Nantes was issued to address the underlying religious strife.1