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The Report of the Iraq Inquiry
Definition and use of “Area of Operations (AO)” and
“Area of Responsibility (AOR)”
Area of Operations (AO)” refers to the UK military’s area of combat operations during
the invasion of Iraq (Phase III of operations). It is the term applied during conflict and is
the area in which lethal force can be applied for a designated period of time.
Area of Responsibility (AOR)” is a term usually applied during peace support
operations. In Iraq, it refers to the area of southern Iraq for which the UK military was
responsible during the post-conflict Occupation (Phase IV of operations).
The two terms were not used consistently and were sometimes applied interchangeably
in the same document.
1060.  On 7 January, Mr Paul Flaherty, MOD Civil Secretary at PJHQ, set out PJHQ’s
thoughts on preparations for Phase IV in a minute to Mr Lee.509 In the absence of an
agreed US inter-agency position on Phase IV planning, the CENTCOM commanders’
conference in Tampa, Florida on 15 and 16 January was likely to have a significant
impact on US policy-making. Phase IV planning was likely to be particularly important:
“… if, as now appears likely, the UK were to take on the first Phase IV AOR in
southern Iraq. We would, in effect be setting the standard for the rest of Phase IV
work. (And, of course, CJO [Lt Gen Reith] is, in any case charged in CDS’ Directive
with planning humanitarian assistance in theatre should it become necessary.)
“From our point of view … we have to begin thinking very soon about the practical
consequences on the ground of taking on the AOR. These include issues such
as: food, water, displaced persons, oil (including accounting for its use), potential
Iranian incursions, pollution as well as, in the slightly longer term, Security Sector
Reform and reconstruction. Some, if not all of this will of course either determine,
or more properly ought to be determined by, strategic considerations of post-conflict
Iraqi structures.”
1061.  Mr Flaherty explained that PJHQ intended to establish a team charged with
“developing planning for Phase IV implementation” as soon as possible, which
would aim to take into account the lessons of the Balkans and Afghanistan. PJHQ
was “in a reasonably good position to link up with US military thinking”, but would
need more support from other government departments to help produce “a fully
joined up approach”.
509  Minute Flaherty to DG Op Pol, 7 January 2003, ‘Op TELIC: Preparing for Phase IV’.
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