General Michael “Erik” Kurilla has officially concluded his military career after three years leading U.S. forces in the Middle East, a tenure that included overseeing President Donald Trump’s strikes on Iran.

Kurilla, known by the nickname “The Gorilla,” capped a four-decade career with his role as chief of U.S. Central Command (CENTCOM), where he directed the unprecedented June strikes on Iran’s nuclear facilities.

He is succeeded by U.S. Navy Admiral Charles Bradford Cooper Jr., who was appointed earlier this month to take command of CENTCOM and oversee U.S. military operations across the region, the UK’s Daily Mail reported.

It remains unclear why Kurilla is stepping down now, even after earning the confidence of Defense Secretary Pete Hegseth, the outlet reported.

At the height of tensions between Iran and Israel earlier this summer, Hegseth granted Kurilla broad operational authority and frequently deferred both decisions and public statements to him.

Kurilla’s departure comes during a period of upheaval at the Defense Department. Hegseth recently dismissed Lt. Gen. Jeffrey Kruse, head of the Defense Intelligence Agency, after he or someone in his office was suspected of leaking an Iran damage assessment suggesting Trump’s strikes on Iran may not have fully destroyed its nuclear program. Kruse’s removal was part of a wave of firings that signaled a sharp shift inside the Pentagon.

In June, Trump announced he had authorized strikes on three Iranian nuclear sites in response to escalating conflict between Israel and Tehran, the Daily Mail added. The U.S. military employed 12 massive 30,000-pound “bunker buster” bombs and 30 Tomahawk missiles in strikes on Iran’s Fordow, Natanz, and Esfahan nuclear facilities.

However, just days later, CNN reported that the DIA’s initial assessment concluded the attacks had not destroyed core components of the sites and may have delayed Iran’s nuclear program by only a matter of weeks. What the report did not say was that the DIA’s assessment was also of “low confidence” in the intelligence.

Viewed by colleagues as highly cautious about Iran’s intentions, Kurilla successfully advocated for a major U.S. military buildup in the Middle East. His recommendations — including dispatching aircraft carriers and increasing the number of combat aircraft — were quickly approved, underscoring both the urgency of the situation and the Pentagon’s confidence in his leadership.

“I know that under the leadership of Admiral Brad Cooper, with the support of the Defense Department and Joint Staff, the counsel and contributions of our allies and partners, and support of our headquarters and component teams, the Soldiers, Sailors, Airmen, Marines, Coastguardsmen, and Guardians of Central Command who serve this nation on the front lines of freedom will always succeed,” Kurilla said this week upon retiring.

“It has been the honor of my life to have been their commander,” he added.