Complex sentence: He became colonel of the 4th Dragoons in March 1788, was additionally created 1st Baron Braybrooke on 30 August 1788 and was promoted to field marshal on 30 July 1796.
Split into simpler sentences: He became colonel of the 4th Dragoons in March 1788. Griffin was additionally created 1st Baron Braybrooke on 30 August 1788 and promoted to field marshal on 30 July 1796.