Complex sentence: Studying law at the University of Dundee, Morrison went on to attend the Royal Military Academy of Sandhurst, before joining the British Army Infantry Regiment and climbing to the rank of Captain.
Split into simpler sentences: Studying law at the University of Dundee, Morrison went on to attend the Royal Military Academy of Sandhurst. Following his education at Sandhurst Royal Military Academy, Morrison joined the British Army Infantry Regiment, climbing to the rank of Captain.