The U.S. Air Force’s most expensive fighter, the twin-engine F-22, has finally attacked a target during a combat deployment.

A pilot flying the Lockheed Martin Raptor attacked an Islamic State (IS) target early Sept. 23 in a successful engagement, says Lt. Col. Edward Sholtis, a spokesman for Air Forces Central Command.

This is an ironic debut for the fighter, which was criticized for decades as a costly boondoggle in air-to-air dominance technology. The addition of ground attack came only after years of development as an afterthought.

During three waves of attacks, U.S. and coalition forces attacked 22 targets with roughly 200 munitions, according to defense officials. More than 90% of the strikes were delivered by precision-guided munitions.

The F-22 was one of a number of aircraft in the second wave of attacks. Others included the F-15, F-16, B-1 bomber and unmanned aircraft.

The F-22 targeted an IS command and control building with GPS-guided precision munitions, Lt. Gen. William Mayville, director of operations for the Joint Staff, told reporters at the Pentagon Sept. 23. Sholtis declined to say what weapon was used, though it was likely a 1,000-lb. Joint Direct Attack Munition or a 250-lb. Small-Diameter Bomb.

The stealthiest aircraft in operation, the F-22 is designed to enter enemy airspace undetected and has onboard sensors capable of collecting intelligence on the battlespace.

Officials declined to say how many F-22s were used during the strikes. They remain in theater at Al Dhafra air base in the United Arab Emirates for future use if needed.

Asked why the U.S. chose to use the F-22, Mayville told reporters: “It’s less [about] the platform, than the effects we seek. And then it’s really what platform can give us those effects.”

The Air Force declared initial operational capability with the F-22 in 2005; full operational capability followed two years later.

The first wave of strikes involved the launch of more than 40 Tomahawk cruise missiles from the USS Arleigh Burke and the USS Philippine Sea. Precision weapons were also used in a third round of strikes against a residential area where IStraining and logistics were located. “It was engaged with multiple GPS guided munitions fired from an F-18 launched from the USS George H.W. Bush,” Mayville said.