In the book, The Trouble with Nigeria, the late Chinua Achebe talked of when the administration of Yakubu Gowon was overthrown in 1975.
Once people got to know that the new head of state was going to be Murtala Mohammed, everything changed. Civil servants got to their offices as early as 7.30am because of his reputation as a no-nonsense leader. Six months later when Mohammed was assassinated, things went back to normal and the indiscipline resumed.