A Pacific Rim kaiju attacks San Francisco in 1941

What would happen if Pacific Rim's Trespasser attacked San Francisco Bay on 10 August 1941?

The United States lacks a reliable way to stop it, although heavy naval artillery might hurt it; the attack could also disrupt or reshape the path to war with Japan.

The scenario places Pacific Rim's Trespasser in San Francisco Bay on 10 August 1941. Most of the Pacific Fleet is described as being in Hawaii, while the United States lacks the nuclear weapon used against the creature in its own setting. The panel doubts that 500- or 1,000-pound bombs would stop it, but expects 14- to 16-inch naval shells to inflict serious damage. Takao's eight-inch gunfire in Godzilla Minus One supplies a comparison, with an explicit caution that the films use different power scales. Naval fire still offers no dependable solution once the creature moves inland beyond gun range. Japan might exploit the American emergency or retain its ships nearer home out of fear of another attack.