After an odd tremor buried a gang under hundreds of tons of rock and Earthy debris, the Self Defense Force deployed an experimental weapon known as the D-03 drill missile to search for survivors. The missiles fired, split, and revealed the jagged features of the D-03 drill, a machine of astonishing potential from both a civil and militaristic perspective. Unfortunately, no survivors were recovered from the site of the incident, save a single truck driver who was convinced that he had seen the abominable face of Godzilla.

However, it soon became clear that a burrowing creature, a legendary monster known as Baragon, was the real culprit behind the attack. It was not until the true Godzilla killed Baragon and arrived in Yokohama that the Taiho would face their most taxing mission yet. These military vehicles remained on standby as the guardian beasts Mothra and Ghidorah entered the fray. They were rendered unconscious by Godzilla's superior strength, and the order was quickly given for all military personnel to attack. Much to the horror of onlookers, Godzilla's atomic ray destroyed all of the Taihos, as well as a escort cruiser and over 90% of the forces that comprised the Yokohama Defense Line. Though these ground-based vehicles had met their end, the D-03 weapon, which they were designed to launch, would eventually prove to be a key weapon in the total annihilation of the nuclear menace.