Complex sentence: He was appointed Ambassador Extraordinary and Plenipotentiary to Uruguay on 15 September 1969, presented his credentials on 13 November 1969 and left the post on 28 September 1972.
Split into simpler sentences: He was appointed Ambassador Extraordinary and Plenipotentiary to Uruguay on 15 September 1969. He presented his credentials on 13 November 1969 and left the post on 28 September 1972.