Direct proof of use
The U.S. Air Force F-15 Eagle fact sheet states that F-15C, F-15D, and F-15E models deployed for Operation Iraqi Freedom in Iraq. A U.S. Central Air Forces air-campaign report for the opening phase of the war separately lists 42 F-15C and 48 F-15E aircraft among peak coalition aircraft employed between March 19 and April 18, 2003.
Air Force imagery from Operation Iraqi Freedom places 494th Expeditionary Fighter Squadron F-15E Strike Eagles over Iraq on combat air support missions and says the squadron deployed from RAF Lakenheath to support the operation.
Sources: F-15 Eagle fact sheet, Operation Iraqi Freedom By The Numbers, Hard bank
Roles in the air campaign
The F-15 family split into two relevant mission sets in the war. F-15C Eagles represented the air-superiority branch of the family, while F-15E Strike Eagles brought the two-seat dual-role strike model used for air-to-air and air-to-ground missions.
The CENTAF report described the Iraqi air threat as including fighter and attack aircraft, early-warning radars, surface-to-air missiles, and anti-aircraft artillery. Within that operating environment, coalition air forces began large-scale air strikes against Iraq on March 21, 2003, and declared air supremacy over all of Iraq on April 6.
Sources: F-15 Eagle fact sheet, F-15E Strike Eagle fact sheet, Operation Iraqi Freedom By The Numbers
Documented F-15E operations over Iraq
The clearest aircraft-specific public imagery in the cataloged sources concerns the F-15E. Air Force photo captions document F-15E Strike Eagles patrolling over Baghdad during a combat air support mission on August 28, 2003, and two 494th Expeditionary Fighter Squadron F-15Es flying through Iraqi airspace during another combat air support mission.
Those records show post-invasion F-15E use after the fall of Baghdad as Operation Iraqi Freedom continued beyond the initial campaign. They support a narrow conclusion: U.S. F-15E aircraft were not merely deployed to the theater, but were flying combat-support missions over Iraq.
Sources: Combat air support, Hard bank
Loss record
The war also included an F-15E combat loss. A Military Times casualty profile for Capt. Eric B. Das states that he died on April 7, 2003, while piloting an F-15E that went down during a combat mission over Iraq. A U.S. Air Force photo caption commemorating Maj. William Watkins and Capt. Das identifies them as an F-15E Strike Eagle crew killed in action during Operation Iraqi Freedom.
Sources: Capt. Eric B. Das profile, Coca-Cola 600 fly over