TERMS OF ENGAGEMENTS FOR – REGULAR ARMY TERMS OF ENGAGEMENTS FOR – REGULAR ARMY Equivalent Ranks of Commissioned Officer and PBOR in three Services TERMS OF ENGAGEMENTS FOR – REGULAR ARMY – APPENDIX –X TERMS OF ENGAGEMENTS FOR – AIR FORCE – APPENDIX –X TERMS OF ENGAGEMENTS FOR NAVY – APPENDIX –X TERMS OF ENGAGEMENTS FOR DSC – APPENDIX –X EQUIVALENCE OF RANKS IN THE THREE SERVICES OF ARMED FORCES – APPENDIX –Y EQUIVALENCE OF GROUPs IN THE THREE SERVICES OF ARMED FORCES – APPENDIX –Z