@Nerevarine@Brink_@ShorticusCascadia would likley have supported the Han with largely material aid, maybe sending in a submarine taskforce to harass and undermine Malagasy. This would largely have been an action to help open the Great Han to pacific trade by improving relations, while fighting against abhuman sympathizers as an added bonus.
On another note, while it isn't listed in my sheet (yet)
@Sigma I feel I should mention Cascadia is enormously urbanized and as I said earlier uses hydroponics to feed it's large population. While this solves the food issue though, with the influx of refugees Cascadia is simply runnig out of land.