They were definitely owned by the Iraqi army, see http://hmvf.co.uk/forumvb/showthread.php?22218 for pictures of Dodge Power Wagons, Land Rovers, Chevrolet CMP gun tractors, M24 Chaffee, Centurion and Churchill tanks, Ferrets, etc.
This is no surprise as Iraq was founded by Great Britain in 1920 and Iraq remained a satellite of Britain for the next three decades, with the British retaining military bases and training the Iraqi Army (source: http://en.wikipedia.org/wiki/Iraq_%E2%80%93_United_Kingdom_relations)