During the BETA Invasion of Japan, the base eventually became part of the new frontlines on the 31st of July, 1998, after a month of unsuccessful military maneuvers by the Imperial Japanese forces to stem the tide of the BETA. Enemy forces approaching from the west took the base by storm, easily overwhelming the newly-commissioned pilots sent there as a security measure, and killing the rest of the IJA personnel within the base. It was finally abandoned when the commander of the pilots decided to retreat from the area, leaving the base behind.
Apart from a unit of technicians, the Imperial Royal Guard White Fang squadron, comprised of fresh graduates and operating various Zuikaku variants, led by IRG Lieutenant Kisaragi Kaori, was stationed here as a defensive unit. Despite their best efforts, the squadron, having taken several casualties, was forced to retreat when the BETA overran the base and the surrounding areas.