Complex sentence: That summer, he was a Staff Officer on the expedition to St Malo, and on August 1 1759 he commanded the Cavalry Regiment under John Manners, Marquess of Granby, at the Battle of Minden.
Split into simpler sentences: That summer, he was a Staff Officer on the expedition to St Malo. On August 1 1759 he commanded the Cavalry Regiment under John Manners, Marquess of Granby, at the Battle of Minden.