The War of Devolution took place from May 1667 to May 1668. In the course of the war, France occupied large parts of the Spanish Netherlands and Franche-Comté, both then provinces of the Holy Roman Empire ruled by Spain. Its name derives from an obscure law known as the Jus Devolutionis, used by Louis XIV to claim that these territories had "devolved" to him by right of marriage to Maria Theresa of Spain.