Roman Catholic forces under Henry I, Duke of Guise, defeat the Protestants, capturing Philippe de Mornay among others.

Henri I de Lorraine, Duke of Guise, Prince of Joinville, Count of Eu, sometimes called Le Balafré ('Scarface'), was the eldest son of François, Duke of Guise, and Anna d'Este. His maternal grandparents were Ercole II d'Este, Duke of Ferrara, and Renée of France. Through his maternal grandfather, he was a descendant of Lucrezia Borgia and Pope Alexander VI.

The Battle of Dormans was fought on 10 October 1575, during the fifth War of Religion in France, between the armies of Henry I, Duke of Guise and the Huguenot-recruited German army of John Casimir of the Palatinate-Simmern.

Philippe de Mornay, seigneur du Plessis Marly, usually known as Du-Plessis-Mornay or Mornay Du Plessis, was a French Protestant writer and member of the anti-monarchist Monarchomaques.