Gaspard de Saulx, sieur de Tavannes was a French Roman Catholic military leader during the Italian Wars and the French Wars of Religion. He served under four kings during his career, participating in the Siege of Calais (1558) and leading the royal army to victory in the third civil war at the Jarnac and Moncontour. A strong Catholic, he founded the confraternity of the holy ghost in 1567 which would be a template for other militant Catholic organisations across France. He died in 1573, shortly after the opening assassinations of the Massacre of Saint Bartholomew, which he had helped plan.

The Battle of Jarnac on 13 March 1569 was an encounter during the French Wars of Religion between the Catholic forces of Marshal Gaspard de Saulx, sieur de Tavannes, and the Huguenots led by Louis I de Bourbon, prince de Condé. The two forces met outside Jarnac between the right bank of the Charente and the high road between Angoulême and Cognac. The Huguenots were routed and Condé was killed after his surrender and his body paraded on an ass in Jarnac.