His next post came in 1567 as governor of Brest, then on 15 May the following year he was made Master General of the Artillery and joined the Council of State. He fought bravely against the Protestants at the Battle of Moncontour on 3 October 1569, with his adroit artillery manoeuvre playing a large part in the Catholic victory. He died in November the same year, noted by Brantome as "by reputation a brave and wise gentleman and a strong man of honour".