Complex sentence: His Majesty King Jigme Singye Wangchuck promoted him to the rank of Goongloen Wogma (Maj. General) in June, 1981, and then as Goongloen Gongma (Lt. General) on August 2,1991.
Split into simpler sentences: His Majesty King (Jigme Singye Wangchuck) promoted him to the rank of Goongloen Wogma (Maj. General) in June, 1981. He was further promoted as Goongloen Gongma (Lt. General) on August 2,1991.