Astutely and very covertly, Van Riper armed his civilian marine craft and deployed them near the US fleet, which never expected an attack from small pleasure boats. Faced with a blunt US ultimatum to surrender, Force Red suddenly went on the offensive: and achieved complete tactical surprise. Force Red's prop-driven aircraft suddenly were swarming around the US warships, making Kamikaze dives. Some of the pleasure boats made suicide attacks. Others fired Silkworm cruise missiles from close range, and sunk a carrier, the largest ship in the US fleet, along with two helicopter-carriers loaded with marines. The sudden strike was reminiscent of the Al Qaeda sneak attack on the USS Cole in 2000. Yet, the Navy was unprepared. When it was over, most of the US fleet had been destroyed. Sixteen US warships lay on the bottom, and the rest were in disarray. Thousands of American sailors were dead, dying, or wounded.
If the games had been real, it would have been the worst US naval defeat since Pearl Harbor.