[BeHoldAPaleHorse]

If one looks at the planning, almost all is done with Japan as the target.

Because they knew that the Manhattan Project would not bear fruit until after Germany was defeated.

[COEXERJ145]

They didn't know that at the time. The planning began in 1943 long before Germany's defeat was assured.

The initial target suggested for the bomb was Truk Lagoon and the Japanese fleet anchored there.