PACEX, short for Pacific Exercise, was a series of large-scale naval exercises conducted by the United States Navy and its allies in the Pacific Ocean during the late Cold War, most notably in 1986. The exercises were designed to demonstrate the ability of the U.S. Pacific Fleet to project power and coordinate complex operations across vast oceanic distances, while also sending a strategic message to the Soviet Union regarding Western naval capabilities. PACEX '89 was one of the largest peacetime naval operations since World War II, involving over 50 ships, hundreds of aircraft, and tens of thousands of personnel from the U.S., Japan, Australia, and Canada. These exercises significantly enhanced interoperability among allied navies and contributed to the deterrence posture of NATO forces in the Pacific theater.
