From the Geneva Concvention:
Chapter II. Wounded and Sick
Art. 12. Members of the armed forces and other persons mentioned in the following Article, who are wounded or sick, shall be respected and protected
in all circumstances.
They shall be treated humanely and cared for by the Party to the conflict in whose power they may be, without any adverse distinction founded on sex,
race, nationality, religion, political opinions, or any other similar criteria. Any attempts upon their lives, or violence to their persons, shall be
strictly prohibited; in particular, they shall not be murdered or exterminated, subjected to torture or to biological experiments; they shall not
wilfully be left without medical assistance and care, nor shall conditions exposing them to contagion or infection be created.
Only urgent medical reasons will authorize priority in the order of treatment to be administered.
Women shall be treated with all consideration due to their sex. The Party to the conflict which is compelled to abandon wounded or sick to the enemy
shall, as far as military considerations permit, leave with them a part of its medical personnel and material to assist in their care.
Art. 13. The present Convention shall apply to the wounded and sick belonging to the following categories:
(1) Members of the armed forces of a Party to the conflict, as well as members of militias or volunteer corps forming part of such armed forces. (2)
Members of other militias and members of other volunteer corps, including those of organized resistance movements, belonging to a Party to the
conflict and operating in or outside their own territory, even if this territory is occupied, provided that such militias or volunteer corps,
including such organized resistance movements, fulfil the following conditions: (a) that of being commanded by a person responsible for his
subordinates; (b) that of having a fixed distinctive sign recognizable at a distance; (c) that of carrying arms openly; (d) that of conducting their
operations in accordance with the laws and customs of war. (3) Members of regular armed forces who profess allegiance to a Government or an authority
not recognized by the Detaining Power. (4) Persons who accompany the armed forces without actually being members thereof, such as civil members of
military aircraft crews, war correspondents, supply contractors, members of labour units or of services responsible for the welfare of the armed
forces, provided that they have received authorization from the armed forces which they accompany. (5) Members of crews, including masters, pilots and
apprentices, of the merchant marine and the crews of civil aircraft of the Parties to the conflict, who do not benefit by more favourable treatment
under any other provisions in international law. (6) Inhabitants of a non-occupied territory, who on the approach of the enemy, spontaneously take up
arms to resist the invading forces, without having had time to form themselves into regular armed units, provided they carry arms openly and respect
the laws and customs of war.
Art. 14. Subject to the provisions of Article 12, the wounded and sick of a belligerent who fall into enemy hands shall be prisoners of war, and the
provisions of international law concerning prisoners of war shall apply to them.
Art. 15. At all times, and particularly after an engagement, Parties to the conflict shall, without delay, take all possible measures to search for
and collect the wounded and sick, to protect them against pillage and ill-treatment, to ensure their adequate care, and to search for the dead and
prevent their being despoiled.
Whenever circumstances permit, an armistice or a suspension of fire shall be arranged, or local arrangements made, to permit the removal, exchange and
transport of the wounded left on the battlefield.
Likewise, local arrangements may be concluded between Parties to the conflict for the removal or exchange of wounded and sick from a besieged or
encircled area, and for the passage of medical and religious personnel and equipment on their way to that area.
Art. 16. Parties to the conflict shall record as soon as possible, in respect of each wounded, sick or dead person of the adverse Party falling into
their hands, any particulars which may assist in his identification. These records should if possible include: (a) designation of the Power on which
he depends; (b) army, regimental, personal or serial number; (c) surname; (d) first name or names; (e) date of birth; (f) any other particulars shown
on his identity card or disc; (g) date and place of capture or death; (h) particulars concerning wounds or illness, or cause of death.
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IF Iraq was part of the Geneva Convention, it should apply to them. If not, then I believe those guys were fair game.
Just my opinion.