Complex sentence: He was promoted to Lieutenant Colonel and was appointed as the "Adjutant General" of BD army, in June 1972 he was appointed as Commander of 44th Brigade at the Comilla Cantonment.
Split into simpler sentences: He was promoted to Lieutenant Colonel and was appointed as the "Adjutant General" of Bangladesh Army. In June 1972 he was appointed as Commander of 44th Brigade at the Comilla Cantonment.