text: FM 2-22.3 ____________________________________________________________________________________
  Only those prisoners of war who, owing to wounds or sickness, would run greater risks by being
  evacuated than by remaining where they are, may be temporarily kept back in a danger zone.
  Prisoners of war shall not be unnecessarily exposed to danger while awaiting evacuation from a
  fighting zone.
  ARTICLE 20
  The evacuation of prisoners of war shall always be effected humanely and in conditions similar
  to those for the forces of the Detaining Power in their changes of station.
  The Detaining Power shall supply prisoners of war who are being evacuated with sufficient food
  and potable water, and with the necessary clothing and medical attention. The Detaining Power
  shall take all suitable precautions to ensure their safety during evacuation, and shall establish
  as soon as possible a list of the prisoners of war who are evacuated.
  If prisoners of war must, during evacuation, pass through transit camps, their stay in such
  camps shall be as brief as possible.
  SECTION II INTERNMENT OF PRISONERS OF WAR
  CHAPTER I GENERAL OBSERVATIONS
  ARTICLE 21
  The Detaining Power may subject prisoners of war to internment. It may impose on them the
  obligation of not leaving, beyond certain limits, the camp where they are interned, or if the said
  camp is fenced in, of not going outside its perimeter. Subject to the provisions of the present
  Convention relative to penal and disciplinary sanctions, prisoners of war may not be held in close
  confinement except where necessary to safeguard their health and then only during the
  continuation of the circumstances which make such confinement necessary.
  Prisoners of war may be partially or wholly released on parole or promise, in so far as is allowed
  by the laws of the Power on which they depend. Such measures shall be taken particularly in
  cases where this may contribute to the improvement of their state of health. No prisoner of war
  shall be compelled to accept liberty on parole or promise.
  Upon the outbreak of hostilities, each Party to the conflict shall notify the adverse Party of the
  laws and regulations allowing or forbidding its own nationals to accept liberty on parole or
  promise. Prisoners of war who are paroled or who have given their promise in conformity with
  the laws and regulations so notified, are bound on their personal honor scrupulously to fulfil,
  both towards the Power on which they depend and towards the Power which has captured them,
  the engagements of their paroles or promises. In such cases, the Power on which they depend is
  bound neither to require nor to accept from them any service incompatible with the parole or
  promise given.