Direct proof of use
Direct evidence places 2.75-inch rockets in U.S. Army attack-aviation use during the 2003 Iraq War. In the July 22, 2003 Mosul operation against Uday and Qusay Hussein, U.S. accounts identified OH-58D Kiowa Warrior helicopters equipped with 2.75-inch rockets, and contemporary reporting said Kiowa helicopters fired rockets at the fortified house after ground troops came under fire.
A U.S. Army Center of Military History account gives a later combat example near Taji. During a September 29, 2007 engagement, two AH-64D Apache Longbow crews from the 1st Battalion, 227th Aviation Regiment returned into enemy fire and expended 40 Hydra rockets along with 30 mm cannon rounds and Hellfire missiles.
Sources: DVIDS Hussein Sons Mission, Washington Post Hussein Sons Firefight, Tip of the Spear Iraq 2004-2007
Timeline
The earliest sourced event in this record is the July 2003 Mosul raid, where 2.75-inch rockets appeared as helicopter-delivered preparatory fire in an urban cordon-and-assault operation. The cited DVIDS republication of the Defense Department account identifies the requested OH-58D Kiowa Warrior rocket support, while Washington Post reporting says the helicopters fired 2.75-inch rockets during the fight.
The 2007 Taji engagement shows the same rocket caliber in the Apache Longbow fire-support role. The Center of Military History account records AH-64 crews expending 40 Hydra rockets in a short engagement against insurgents and gun trucks near Taji.
Sources: DVIDS Hussein Sons Mission, Washington Post Hussein Sons Firefight, Tip of the Spear Iraq 2004-2007
Narrative
In Iraq, the documented 2.75-inch rocket role was aircraft-launched fire support from U.S. Army armed reconnaissance and attack helicopters. The record is not a single procurement or transfer story; it is an employment pattern tied to helicopter units operating in Iraq during the U.S.-led invasion, occupation, and insurgency period.
The 2003 Mosul case involved OH-58D Kiowa Warriors supporting ground forces around a fortified residence. The available sources connect the rockets to preparatory fire and suppression during a specific raid, but the later DVIDS account attributes the fatal strike primarily to TOW missiles rather than to the 2.75-inch rockets.
The 2007 Taji case is clearer as a combat expenditure record for Hydra-family rockets. Center of Military History narrative places AH-64D crews under fire near Taji and records the number of Hydra rockets expended during the engagement. Other Iraq-era DVIDS reporting describes Apache units in Iraq as armed with 2.75-inch rockets and assigned to ground-support, reconnaissance, convoy-protection, and force-protection missions.
Sources: DVIDS Hussein Sons Mission, Tip of the Spear Iraq 2004-2007, DVIDS Flying Apaches Iraq, DVIDS Eagle Attack Anaconda, Army Apache AH-64D/E PDF