The North Korean regime has distributed a song to troops warbling of absolute loyalty to leader Kim Jong-un.

The campaign is reportedly spearheaded by vice marshal Hwang Pyong-so.

Lee Soo-seok of the Institute for National Security Strategy said Wednesday the North Korean army has re-introduced the song which dates from the time of nation founder Kim Il-sung.

He said North Korean soldiers have been ordered to sing the song on every march to create an atmosphere of loyalty to Kim junior, who is trying to bring the unruly military under control.

Meanwhile, the institute said around 100 high-ranking officials have been purged since Kim rose to power, including more than one-third of senior officials in the Workers Party.

"Unlike his father Kim Jong-il, Kim Jong-un has tended to purge officials for angering him rather than due to political reasons," Lee claimed. "His rule of terror has been effective temporarily, but a prolonged atmosphere of fear has hurt the sense of solidarity between Kim and high-level officials."