Complex sentence: He became Chief of Joint Operations at Permanent Joint Headquarters (UK) in 2006 and, after being relieved of that post on 13 March 2009, he was promoted to general and appointed Vice-Chief of the Defence Staff on 5 May 2009.
Split into simpler sentences: He became Chief of Joint Operations at Permanent Joint Headquarters (UK) in 2006 and was relieved of that post on 13 March 2009. He was promoted to general and appointed Vice-Chief of the Defence Staff on 5 May 2009.