Final answer:
Henry IV claimed the throne of France at the end of the War of the Three Henrys, converting to Catholicism and issuing the Edict of Nantes to ensure religious tolerance for the Huguenots. Henry IV was able to claim the throne of France by issuing the Edict of Nantes, which granted religious freedom to Protestants.
Step-by-step explanation:
Henry IV was able to claim the throne of France after a period marked by religious conflict and the War of the Three Henrys, which pitted different factions against each other for control of the country.
The strife came to an end with the conclusion by Catholic moderates that domestic tranquilitywas more important than religious doctrine. Following the deaths of the other contenders, Henry III and Henry of Guise, the Protestant Henry of Navarre, who was the last standing, ascended to the throne as Henry IV.
In a significant move to promote stability, after his rise to power, Henry IV converted to Roman Catholicism, and in a further effort to pacify the nation, he issued the Edict of Nantes in 1598, granting liberty of conscience and liberty of worship to French Protestants, known as the Huguenots.