The French Wars of Religion (French: Guerres de Religion en France) were a series of civil wars between French Catholics and Protestants (called Huguenots) from 1562 to 1598. Between two and four million people died from violence, famine or disease directly caused by the conflict, and it severely damaged the power of the French monarchy. The fighting ended with a compromise in 1598, when Henry of Navarre, who converted to Catholicism in 1593, was proclaimed King Henry IV of France and issued the Edict of Nantes, which granted substantial rights and freedoms to the Huguenots. However, Catholics continued to disapprove of Protestants and of Henry, and his assassination in 1610 triggered a fresh round of Huguenot rebellions in the 1620s.
Tensions between the two religions had been building since the 1530s, exacerbating existing regional divisions, and quests for power among the nobles. The sudden accidental death of Henry II of France in July 1559 initiated a prolonged struggle for power between his widow Catherine de' Medici and powerful nobles. These included a fervently Catholic faction led by the Guise and Montmorency families, and Protestants headed by the House of Condé and the Navarrese queen, Jeanne d'Albret. Both sides received assistance from external powers, with Spain and Savoy supporting the Catholics, and England and the Dutch Republic backing the Protestants.
Moderates, also known as Politiques, hoped to maintain order by centralising power and making concessions to Huguenots, rather than the policies of repression pursued by Henry II and his father Francis I. The Politiques were initially supported by Catherine de' Medici, whose January 1562 Edict of Saint-Germain was strongly opposed by the Guise faction and led to an outbreak of widespread fighting in March. She later hardened her stance and backed the 1572 St. Bartholomew's Day massacre in Paris, which resulted in Catholic mobs killing between 5,000 and 30,000 Protestants throughout France.
The wars threatened the authority of the monarchy and the last Valois kings, Catherine's three sons Francis II, Charles IX, and Henry III. Their Bourbon successor Henry IV responded by creating a strong central state and extending toleration to Huguenots; the latter policy would last until 1685, when Henry's grandson Louis XIV revoked the Edict of Nantes.
Along with "French Wars of Religion" and "Huguenot Wars", the wars have also been variously described as the "Eight Wars of Religion", or simply the "Wars of Religion" (only within France).
The exact number of wars and their respective dates are subject to continued debate by historians: some assert that the Edict of Nantes (13 April 1598) and the Peace of Vervins (2 May 1598) concluded the wars, while the ensuing 1620s Huguenot rebellions lead others to believe the Peace of Alès in 1629 is the actual conclusion. However, the agreed upon beginning of the wars is the Massacre of Wassy in 1562, and the Edict of Nantes at least ended this series of conflicts. During this time, complex diplomatic negotiations and agreements of peace were followed by renewed conflict and power struggles.
American military historians Kiser, Drass and Brustein (1994) maintained the following divisions, periodisations and locations:
Massacre of Vassy (1562) – Western France
First War of Religion (1562–1563) – Western and Southwestern France
Second War of Religion (1567–1568) – Western and Southwestern France
Third War of Religion (1568–1570) – Western and Southwestern France
St. Bartholomew's Day massacre (1572) – Northeastern France
Fourth War of Religion (1572–1573) – Western and Southwestern France
Fifth War of Religion (1575–1576) – Western and Southwestern France
Sixth War of Religion (1576–1577) – Western and Southwestern France
Seventh War of Religion (1580) – Western and Southwestern France
Eighth War of Religion (1585–1589) – Western and Southwestern France
Ninth War of Religion (1589–1598) – Western and Southwestern France