civilianise

/S IH1 V IH1 L IY0 AA1 N AH0 S/
verb
  1. 1

    To convert from military to civilian operation or control.

  2. 2

    To change the status of (a member of the armed forces) to that of a civilian.

Source: https://en.wiktionary.org/wiki/civilianise, https://en.wiktionary.org/wiki/civilianize