War of Devolution
During the 1667–1668 War of Devolution with Spain, La Feuillade was in the army under de Rochebaron that captured the towns of Bergues, Veurne and Courtrai/Kortrijk between June and July. When it ended, he was part of a French expeditionary force sent to the Venetian island of Candia or Crete, besieged by the Ottomans since 1648 but it was withdrawn in August 1669 and the island surrendered in September.