Complex sentence: In November 1792 at the Battle of Jemappes, he fought with remarkable bravery, when that battle seemed lost, Kilmaine and the Duke of Chartres (the future king of France as Louis Philippe) turned apparent defeat into victory.
Split into simpler sentences: In November 1792 at the Battle of Jemappes, he fought with remarkable bravery. When that battle seemed lost, Kilmaine and the Duke of Chartres (the future king of France as Louis Philippe) turned apparent defeat into victory.