Direct proof of use
Dzik-3 armored personnel carriers were documented in Iraqi Army service during the 2003 Iraq War. A DVIDS/War.gov report dated April 11, 2006 said the 6th Iraqi Army Division's military police company had received four Polish-made Dzik-3 vehicles at the end of March as part of an Iraqi Ministry of Defense effort to give its soldiers better protected vehicles.
The same report described the vehicles being used in operations in Baghdad: the military-police company conducted its first Dzik mission on March 29, 2006 as a personal-security detail with American soldiers in the lead, and then continued on missions before taking the lead in personal-security convoys with coalition forces.
Sources: DVIDS Iraq Dzik Training
Timeline
Open sources place the Iraqi Dzik-3 program before the March 2006 fielding. Army Guide describes a contract for Dzik-3 vehicles for Iraq, with the first batch of 600 supplied from 2005 under a USD100 million contract and referred to as Ain Jaria.
In March 2006, Iraq's Ministry of Defense started a Dzik training course for selected soldiers from the 6th Iraqi Army Division. After graduating on March 16, the military-police company's drivers trained other soldiers, and on March 29 the company used the Dziks on its first personal-security mission.
Sources: Army Guide Dzik 2, DVIDS Iraq Dzik Training
Narrative
The Dzik-3 role documented in Iraq was protected mobility for Iraqi security forces rather than heavy mechanized combat. DVIDS described the 4.5-ton Polish-made vehicles as armored personnel carriers with all-around armor, bulletproof windows, puncture-proof tires, smoke launchers, and firing ports, replacing light utility vehicles that had offered little protection to military-police patrols.
The fielded vehicles were tied to Iraqi state forces. DVIDS identified the user as the 6th Iraqi Army Division's military police company and described U.S. Army advisers supporting the Iraqi training effort. The report also framed the vehicles as part of the Iraqi Defense Ministry's attempt to equip a new army while the war was ongoing.
Army Guide provides broader variant context for the Iraqi vehicles, describing Dzik-3 as an internal-security version and noting the Ain Jaria name used for the Iraqi order. That background aligns with the DVIDS account of military-police patrol and convoy-security use in Baghdad.
Sources: DVIDS Iraq Dzik Training, Army Guide Dzik 2