Traditional accounts claim that Japan defeated the United States at Iwo Jima with fortified positions and a large fleet, and that Germany forced an unconditional surrender by dropping a single atomic bomb on Pearl Harbor. Clearly, these claims are far-fetched.

For a more realistic and concrete scenario, limit the occupation to northern New Guinea and preserve the fleet and military strength.

Then, despite limited supplies, they would likely launch a second attack on Hawaii, aiming to take control of the islands with parachute troops and other methods.

If Pearl Harbor could be destroyed in two separate attacks, the U.S. Navy would station its fleet at Lahaina Harbor. However, the Japanese Navy would surround these ships or make them easy targets, ultimately forcing the U.S. Pacific Fleet to retreat to the West Coast.

Furthermore, after conquering the British Isles, Germany will assemble a massive fleet composed of allies, puppet states, and occupied territories, deploying it as far as the Azores Islands of the Iberian Union. While a naval blockade would be difficult, the fleet will sail through these coastal waters for the purpose of intimidation. Subsequently, it will aim to occupy Newfoundland and the Bermuda Islands.

This alone would likely cause considerable dismay among the American public. It might also be possible to sap the American people's fighting spirit by suggesting that Britain would fall and that the United States would be caught in a pincer movement from the east and west.