Complex sentence: CDM started its first batch of Long Defence Management Course (LDMC) in March 1971 with a strength of 44 students which has since been upgraded to cover three levels of courses, at Masters, MPhil and doctoral levels.
Split into simpler sentences: CDM started its first batch of Long Defence Management Course (LDMC) in March 1971 with 44 students. This has since been upgraded to cover three levels of courses, at Masters, MPhil and doctoral levels.