Sarsfield fought in the battles of Entzheim, Turckheim, and Altenheim; he and Hamilton were standing next to Turenne when he was killed by a chance shot at Salzbach in July 1675. He remained in France until the war ended in 1678, then returned to London to join a new regiment being recruited by the Earl of Limerick; he was caught up in the Popish Plot, and like other Catholics barred from serving in the military.