The assassination of Admiral Coligny on 24 August 1572 would prelude one of the critical events of the French Wars of Religion, the Massacre of Saint Bartholomew. The figures responsible for first the attempt on his life on 22 August and then his execution on 24 August have long been debated by historians. Coligny's feud with Henry I, Duke of Guise throughout the 1560s and his desire to bring France into conflict with Spain are often cited as key factors. The attempt on his life took place in the wake of the marriage between Navarre and Margaret of Valois a high-profile affair intended as a component of the Peace of Saint-Germain-en-Laye by Catherine de'Medici and her son Charles IX.