In a world where the appearance of monsters was becoming ever more frequent, the need for a variety of quick-response military vehicles presented itself to the Japanese Self-Defense Force. Enter the SAR-1, equipped with a sophisticated radar system used for long-range communication during the heat of battle. These machines were summoned during the tension of the 1972 conflicts, including the initial assault on Anguirus at Sagami Bay, and the final battle between Godzilla, Anguirus, Gigan, and King Ghidorah at Children's Land in Tokyo. Despite the defeat of these creatures, the shadow of conflict still remained. A mysterious civilization known as the Seatopians unleashed the gargantuan roach Megalon only one year later on the mainland, and though the military fought valiantly, the SAR-1 and its armed allies were forced to retreat. Fortunately, Godzilla and the mechanized wonder Jet Jaguar repelled Megalon, even after this new enemy was aided by the dreaded return of Gigan to planet Earth.

Decades passed, and near the close of the 20th century, the SAR-1 was still in use. After the Kilaak alien race gained control over the Earth's monsters and staged a calculated strike on the world's major cities, the Self-Defense Force attempted to destroy the base of the extra terrestrials at the foot of Mt. Fuji. The SAR-1 was among those participating in the assault; however, Godzilla and Anguirus devastated the resistance and forced a full retreat. In the end, the Earthlings finally prevailed against their oppressors from afar, and the SAR-1 remained ready to provide its ever-necessary service in case the world was ever again forced to defend itself from danger.