I had never seen that map before. It really brings home the overwhelming scale of what it would have taken to invade Japan. So many lives would have been lost, so much property destroyed. . . .
Olympic was only supposed to occupy the southern 1/3 of Kyushu and turn it into a huge airfield.
Coronet in 46' would have been the assault on Tokyo.
The Soviets were the wild card. Their invasions on Manchuria and Sakhalin were wildly successful.