The postwar order after a successful UNCF defence

How would the postwar order change after the UNCF successfully defended the Solar System while Yamato's voyage still occurred?

Earth would retain more industry and a stronger defensive position, but preserving Yamato's voyage requires a new explanation for Iscandar's intervention. Garmillas's leadership and the later alliance remain disputed assumptions.

A successful defence of the Solar System would leave Earth with more surviving industry than it possesses after the original Space Battleship Yamato campaign. The earlier asteroid-defence proposal also prompts the prediction that Garmillas would approach asteroid fields much more cautiously. The assumption that defeat would remove its ruler is disputed, since another reading of the story emphasises his continuing popular support. The larger problem is preserving Yamato's voyage after removing the devastation that caused it. Iscandar sends its technology in response to Earth's destruction, so a successful defence changes the reason for that intervention. The proposed postwar therefore depends on finding another way for Earth to receive the technology and for the subsequent alliance to form.